<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 6.5b -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: https://www.novaworks.com -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x00000000 -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#Cover" roleURI="http://helio.space.com/role/Cover" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#CondensedConsolidatedBalanceSheets" roleURI="http://helio.space.com/role/CondensedConsolidatedBalanceSheets" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#CondensedConsolidatedBalanceSheetsParenthetical" roleURI="http://helio.space.com/role/CondensedConsolidatedBalanceSheetsParenthetical" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#CondensedConsolidatedStatementsOfOperations" roleURI="http://helio.space.com/role/CondensedConsolidatedStatementsOfOperations" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#CondensedConsolidatedStatementsOfChangesInShareholdersEquity" roleURI="http://helio.space.com/role/CondensedConsolidatedStatementsOfChangesInShareholdersEquity" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#CondensedConsolidatedStatementsOfCashFlows" roleURI="http://helio.space.com/role/CondensedConsolidatedStatementsOfCashFlows" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#Business" roleURI="http://helio.space.com/role/Business" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SummaryOfSignificantAccountingPolicies" roleURI="http://helio.space.com/role/SummaryOfSignificantAccountingPolicies" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#PropertyAndEquipment" roleURI="http://helio.space.com/role/PropertyAndEquipment" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayableRelatedParties" roleURI="http://helio.space.com/role/NotesPayableRelatedParties" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayable" roleURI="http://helio.space.com/role/NotesPayable" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#ConvertibleNotesPayable" roleURI="http://helio.space.com/role/ConvertibleNotesPayable" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#DerivativeFinancialInstruments" roleURI="http://helio.space.com/role/DerivativeFinancialInstruments" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#StockOptions" roleURI="http://helio.space.com/role/StockOptions" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#Leases" roleURI="http://helio.space.com/role/Leases" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#CommitmentsAndContingencies" roleURI="http://helio.space.com/role/CommitmentsAndContingencies" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#ClientConcentrations" roleURI="http://helio.space.com/role/ClientConcentrations" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SegmentInformation" roleURI="http://helio.space.com/role/SegmentInformation" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#Equity" roleURI="http://helio.space.com/role/Equity" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SubsequentEvents" roleURI="http://helio.space.com/role/SubsequentEvents" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SummaryOfSignificantAccountingPoliciesPolicies" roleURI="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesPolicies" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SummaryOfSignificantAccountingPoliciesTables" roleURI="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesTables" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#PropertyAndEquipmentTables" roleURI="http://helio.space.com/role/PropertyAndEquipmentTables" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayableRelatedPartiesTables" roleURI="http://helio.space.com/role/NotesPayableRelatedPartiesTables" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayableTables" roleURI="http://helio.space.com/role/NotesPayableTables" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#ConvertibleNotesPayableTables" roleURI="http://helio.space.com/role/ConvertibleNotesPayableTables" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#DerivativeFinancialInstrumentsTables" roleURI="http://helio.space.com/role/DerivativeFinancialInstrumentsTables" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#StockOptionsTables" roleURI="http://helio.space.com/role/StockOptionsTables" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#LeasesTables" roleURI="http://helio.space.com/role/LeasesTables" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#ClientConcentrationsTables" roleURI="http://helio.space.com/role/ClientConcentrationsTables" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#BusinessDetailsNarrative" roleURI="http://helio.space.com/role/BusinessDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SummaryOfSignificantAccountingPoliciesDetails-EstimatedUsefulLives" roleURI="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesDetails-EstimatedUsefulLives" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SummaryOfSignificantAccountingPoliciesDetails-FairValueMeasurements" roleURI="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesDetails-FairValueMeasurements" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SummaryOfSignificantAccountingPoliciesDetails-EarningsPerShare" roleURI="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesDetails-EarningsPerShare" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SummaryOfSignificantAccountingPoliciesDetailsNarrative" roleURI="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#PropertyAndEquipmentDetails-PropertyAndEquipment" roleURI="http://helio.space.com/role/PropertyAndEquipmentDetails-PropertyAndEquipment" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#PropertyAndEquipmentDetailsNarrative" roleURI="http://helio.space.com/role/PropertyAndEquipmentDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayable-RelatedPartiesDetails-RelatedParties" roleURI="http://helio.space.com/role/NotesPayable-RelatedPartiesDetails-RelatedParties" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayableRelatedPartiesDetailsNarrative" roleURI="http://helio.space.com/role/NotesPayableRelatedPartiesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayableDetails-NotesPayable" roleURI="http://helio.space.com/role/NotesPayableDetails-NotesPayable" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayableDetails" roleURI="http://helio.space.com/role/NotesPayableDetails" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayableDetails-AggregateMaturityOnNotesPayable" roleURI="http://helio.space.com/role/NotesPayableDetails-AggregateMaturityOnNotesPayable" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#NotesPayableDetailsNarrative" roleURI="http://helio.space.com/role/NotesPayableDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#ConvertibleNotesPayableDetails" roleURI="http://helio.space.com/role/ConvertibleNotesPayableDetails" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#ConvertibleNotesPayableDetailsNarrative" roleURI="http://helio.space.com/role/ConvertibleNotesPayableDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#DerivativeFinancialInstrumentsDetails-DerivativeLiabilities" roleURI="http://helio.space.com/role/DerivativeFinancialInstrumentsDetails-DerivativeLiabilities" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#DerivativeFinancialInstrumentsDetails-ChangesInFairValuesOfDerivative" roleURI="http://helio.space.com/role/DerivativeFinancialInstrumentsDetails-ChangesInFairValuesOfDerivative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#DerivativeFinancialInstrumentsDetails-RangeOfInputsByValuationTechnique" roleURI="http://helio.space.com/role/DerivativeFinancialInstrumentsDetails-RangeOfInputsByValuationTechnique" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#DerivativeFinancialInstrumentsDetails-ChangesInFairValueInputs" roleURI="http://helio.space.com/role/DerivativeFinancialInstrumentsDetails-ChangesInFairValueInputs" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#StockOptionsDetails-StockOptionsGranted" roleURI="http://helio.space.com/role/StockOptionsDetails-StockOptionsGranted" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#StockOptionsDetailsNarrative" roleURI="http://helio.space.com/role/StockOptionsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#LeasesDetails-RightOfUseLeaseAssetAndOperatingLeaseLiability" roleURI="http://helio.space.com/role/LeasesDetails-RightOfUseLeaseAssetAndOperatingLeaseLiability" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#LeasesDetails-FutureMinimumLeasePayments" roleURI="http://helio.space.com/role/LeasesDetails-FutureMinimumLeasePayments" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#LeasesDetailsNarrative" roleURI="http://helio.space.com/role/LeasesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#ClientConcentrationsDetails-AccountsReceivableConcentrationByCustomer" roleURI="http://helio.space.com/role/ClientConcentrationsDetails-AccountsReceivableConcentrationByCustomer" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#ClientConcentrationsDetailsNarrative" roleURI="http://helio.space.com/role/ClientConcentrationsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#SegmentInformationDetailsNarrative" roleURI="http://helio.space.com/role/SegmentInformationDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="hleo-20260430.xsd#EquityDetailsNarrative" roleURI="http://helio.space.com/role/EquityDetailsNarrative" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/Cover" xlink:title="00000001 - Document - Cover" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/CondensedConsolidatedBalanceSheets" xlink:title="00000002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaapAssetsCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaapAccountsReceivableNetCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapAccountsReceivableNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaapAssetsNoncurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaapPropertyPlantAndEquipmentNet" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecurityDeposit" xlink:label="loc_us-gaapSecurityDeposit" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapSecurityDeposit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaapOperatingLeaseRightOfUseAsset" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapOperatingLeaseRightOfUseAsset" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets" xlink:label="loc_us-gaapAssets" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsCurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaapLiabilitiesCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaapAccountsPayableAndAccruedLiabilitiesCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccountsPayableAndAccruedLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaapEmployeeRelatedLiabilitiesCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapEmployeeRelatedLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="hleo-20260430.xsd#HLEO_NotesPayableRelatedPartiesCurrent" xlink:label="loc_HLEONotesPayableRelatedPartiesCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_HLEONotesPayableRelatedPartiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesPayableCurrent" xlink:label="loc_us-gaapNotesPayableCurrent" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapNotesPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtCurrent" xlink:label="loc_us-gaapConvertibleDebtCurrent" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapConvertibleDebtCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="loc_us-gaapDerivativeLiabilitiesCurrent" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapDerivativeLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityCurrent" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapOperatingLeaseLiabilityCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaapLiabilitiesNoncurrent" />
      <link:loc xlink:type="locator" xlink:href="hleo-20260430.xsd#HLEO_NotesPayableRelatedPartiesNonCurrent" xlink:label="loc_HLEONotesPayableRelatedPartiesNonCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_HLEONotesPayableRelatedPartiesNonCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermNotesPayable" xlink:label="loc_us-gaapLongTermNotesPayable" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_us-gaapLongTermNotesPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityNoncurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_us-gaapOperatingLeaseLiabilityNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaapLiabilities" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaapStockholdersEquity" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaapPreferredStockValue" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapPreferredStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="hleo-20260430.xsd#HLEO_CommonStockToBeIssuedValue" xlink:label="loc_HLEOCommonStockToBeIssuedValue" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_HLEOCommonStockToBeIssuedValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaapCommonStockValue" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapCommonStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaapAdditionalPaidInCapital" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapAdditionalPaidInCapital" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaapRetainedEarningsAccumulatedDeficit" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapRetainedEarningsAccumulatedDeficit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaapLiabilitiesAndStockholdersEquity" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapLiabilities" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapStockholdersEquity" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:title="00000003 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/CondensedConsolidatedStatementsOfOperations" xlink:title="00000004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaapGrossProfit" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues" xlink:label="loc_us-gaapRevenues" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapRevenues" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaapCostOfRevenue" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapCostOfRevenue" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaapOperatingExpenses" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaapGeneralAndAdministrativeExpense" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapGeneralAndAdministrativeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="loc_us-gaapLaborAndRelatedExpense" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapLaborAndRelatedExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="hleo-20260430.xsd#HLEO_FacilitiesExpense" xlink:label="loc_HLEOFacilitiesExpense" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_HLEOFacilitiesExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfessionalFees" xlink:label="loc_us-gaapProfessionalFees" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapProfessionalFees" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaapDepreciation" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapDepreciation" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaapOperatingIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapGrossProfit" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapOperatingExpenses" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaapNonoperatingIncomeExpense" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating" xlink:label="loc_us-gaapInterestExpenseNonoperating" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapInterestExpenseNonoperating" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaapAmortizationOfFinancingCosts" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapAmortizationOfFinancingCosts" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="loc_us-gaapDerivativeGainLossOnDerivativeNet" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapDerivativeGainLossOnDerivativeNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnRepurchaseOfDebtInstrument" xlink:label="loc_us-gaapGainLossOnRepurchaseOfDebtInstrument" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapGainLossOnRepurchaseOfDebtInstrument" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="hleo-20260430.xsd#HLEO_LossOnModificationOfDebt" xlink:label="loc_HLEOLossOnModificationOfDebt" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_HLEOLossOnModificationOfDebt" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ExtinguishmentOfDebtAmount" xlink:label="loc_us-gaapExtinguishmentOfDebtAmount" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapExtinguishmentOfDebtAmount" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapOperatingIncomeLoss" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapNonoperatingIncomeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaapIncomeTaxExpenseBenefit" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapIncomeTaxExpenseBenefit" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/CondensedConsolidatedStatementsOfChangesInShareholdersEquity" xlink:title="00000005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS&apos; EQUITY (UNAUDITED)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:title="00000006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapNetIncomeLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaapDepreciationDepletionAndAmortization" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapDepreciationDepletionAndAmortization" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaapShareBasedCompensation" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapShareBasedCompensation" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xlink:label="loc_us-gaapIssuanceOfStockAndWarrantsForServicesOrClaims" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIssuanceOfStockAndWarrantsForServicesOrClaims" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ExtinguishmentOfDebtAmount" xlink:label="loc_us-gaapExtinguishmentOfDebtAmount" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapExtinguishmentOfDebtAmount" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="hleo-20260430.xsd#HLEO_LossOnModificationOfDebt" xlink:label="loc_HLEOLossOnModificationOfDebt" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_HLEOLossOnModificationOfDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnRepurchaseOfDebtInstrument" xlink:label="loc_us-gaapGainLossOnRepurchaseOfDebtInstrument" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapGainLossOnRepurchaseOfDebtInstrument" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="loc_us-gaapAmortizationOfDebtDiscountPremium" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapAmortizationOfDebtDiscountPremium" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense" xlink:label="loc_us-gaapOperatingLeaseRightOfUseAssetAmortizationExpense" />
      <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapOperatingLeaseRightOfUseAssetAmortizationExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="loc_us-gaapDerivativeGainLossOnDerivativeNet" />
      <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapDerivativeGainLossOnDerivativeNet" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsReceivable" />
      <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsReceivable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaapIncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" />
      <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="hleo-20260430.xsd#HLEO_IncreaseDecreaseInWorkInProgress" xlink:label="loc_HLEOIncreaseDecreaseInWorkInProgress" />
      <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_HLEOIncreaseDecreaseInWorkInProgress" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInCustomerDeposits" xlink:label="loc_us-gaapIncreaseDecreaseInCustomerDeposits" />
      <link:calculationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInCustomerDeposits" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsPayableAndAccruedLiabilities" />
      <link:calculationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities" xlink:label="loc_us-gaapIncreaseDecreaseInEmployeeRelatedLiabilities" />
      <link:calculationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInEmployeeRelatedLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability" xlink:label="loc_us-gaapIncreaseDecreaseInOperatingLeaseLiability" />
      <link:calculationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInOperatingLeaseLiability" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaapProceedsFromIssuanceOfCommonStock" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromIssuanceOfCommonStock" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromNotesPayable" xlink:label="loc_us-gaapProceedsFromNotesPayable" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromNotesPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromRelatedPartyDebt" xlink:label="loc_us-gaapProceedsFromRelatedPartyDebt" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromRelatedPartyDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromConvertibleDebt" xlink:label="loc_us-gaapProceedsFromConvertibleDebt" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromConvertibleDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfNotesPayable" xlink:label="loc_us-gaapRepaymentsOfNotesPayable" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapRepaymentsOfNotesPayable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfConvertibleDebt" xlink:label="loc_us-gaapRepaymentsOfConvertibleDebt" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapRepaymentsOfConvertibleDebt" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="hleo-20260430.xsd#HLEO_RepaymentOfNotesPayableRelatedParties" xlink:label="loc_HLEORepaymentOfNotesPayableRelatedParties" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_HLEORepaymentOfNotesPayableRelatedParties" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaapProceedsFromStockOptionsExercised" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromStockOptionsExercised" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/Business" xlink:title="999012 - Disclosure - BUSINESS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SummaryOfSignificantAccountingPolicies" xlink:title="999013 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/PropertyAndEquipment" xlink:title="999014 - Disclosure - PROPERTY AND EQUIPMENT" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayableRelatedParties" xlink:title="999015 - Disclosure - NOTES PAYABLE &#8211; RELATED PARTIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayable" xlink:title="999016 - Disclosure - NOTES PAYABLE" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/ConvertibleNotesPayable" xlink:title="999017 - Disclosure - CONVERTIBLE NOTES PAYABLE" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/DerivativeFinancialInstruments" xlink:title="999018 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/StockOptions" xlink:title="999019 - Disclosure - STOCK OPTIONS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/Leases" xlink:title="999020 - Disclosure - LEASES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/CommitmentsAndContingencies" xlink:title="999021 - Disclosure - COMMITMENTS AND CONTINGENCIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/ClientConcentrations" xlink:title="999022 - Disclosure - CLIENT CONCENTRATIONS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SegmentInformation" xlink:title="999023 - Disclosure - SEGMENT INFORMATION" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/Equity" xlink:title="999024 - Disclosure - EQUITY" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SubsequentEvents" xlink:title="999025 - Disclosure - SUBSEQUENT EVENTS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:title="999026 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:title="999027 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/PropertyAndEquipmentTables" xlink:title="999028 - Disclosure - PROPERTY AND EQUIPMENT (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayableRelatedPartiesTables" xlink:title="999029 - Disclosure - NOTES PAYABLE &#8211; RELATED PARTIES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayableTables" xlink:title="999030 - Disclosure - NOTES PAYABLE (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/ConvertibleNotesPayableTables" xlink:title="999031 - Disclosure - CONVERTIBLE NOTES PAYABLE (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/DerivativeFinancialInstrumentsTables" xlink:title="999032 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/StockOptionsTables" xlink:title="999033 - Disclosure - STOCK OPTIONS (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/LeasesTables" xlink:title="999034 - Disclosure - LEASES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/ClientConcentrationsTables" xlink:title="999035 - Disclosure - CLIENT CONCENTRATIONS (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/BusinessDetailsNarrative" xlink:title="999036 - Disclosure - BUSINESS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesDetails-EstimatedUsefulLives" xlink:title="999037 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details - Estimated useful lives)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesDetails-FairValueMeasurements" xlink:title="999038 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details - Fair value measurements)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesDetails-EarningsPerShare" xlink:title="999039 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details - Earnings per share)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" xlink:title="999040 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/PropertyAndEquipmentDetails-PropertyAndEquipment" xlink:title="999041 - Disclosure - PROPERTY AND EQUIPMENT (Details - Property and equipment)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/PropertyAndEquipmentDetailsNarrative" xlink:title="999042 - Disclosure - PROPERTY AND EQUIPMENT (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayable-RelatedPartiesDetails-RelatedParties" xlink:title="999043 - Disclosure - NOTES PAYABLE - RELATED PARTIES (Details - Related parties)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayableRelatedPartiesDetailsNarrative" xlink:title="999044 - Disclosure - NOTES PAYABLE &#8211; RELATED PARTIES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayableDetails-NotesPayable" xlink:title="999045 - Disclosure - NOTES PAYABLE (Details - Notes payable)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayableDetails" xlink:title="999046 - Disclosure - NOTES PAYABLE (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayableDetails-AggregateMaturityOnNotesPayable" xlink:title="999047 - Disclosure - NOTES PAYABLE (Details - Aggregate maturity on notes payable)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/NotesPayableDetailsNarrative" xlink:title="999048 - Disclosure - NOTES PAYABLE (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/ConvertibleNotesPayableDetails" xlink:title="999049 - Disclosure - CONVERTIBLE NOTES PAYABLE (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/ConvertibleNotesPayableDetailsNarrative" xlink:title="999050 - Disclosure - CONVERTIBLE NOTES PAYABLE (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/DerivativeFinancialInstrumentsDetails-DerivativeLiabilities" xlink:title="999051 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Details - Derivative liabilities)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/DerivativeFinancialInstrumentsDetails-ChangesInFairValuesOfDerivative" xlink:title="999052 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Details - Changes in the fair values of the derivative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/DerivativeFinancialInstrumentsDetails-RangeOfInputsByValuationTechnique" xlink:title="999053 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Details - range of inputs by valuation technique)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/DerivativeFinancialInstrumentsDetails-ChangesInFairValueInputs" xlink:title="999054 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Details - Changes in fair value inputs)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/StockOptionsDetails-StockOptionsGranted" xlink:title="999055 - Disclosure - STOCK OPTIONS (Details - Stock options granted)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/StockOptionsDetailsNarrative" xlink:title="999056 - Disclosure - STOCK OPTIONS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/LeasesDetails-RightOfUseLeaseAssetAndOperatingLeaseLiability" xlink:title="999057 - Disclosure - LEASES (Details - Right of use lease asset and operating lease liability)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/LeasesDetails-FutureMinimumLeasePayments" xlink:title="999058 - Disclosure - LEASES (Details - Future minimum lease payments)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/LeasesDetailsNarrative" xlink:title="999059 - Disclosure - LEASES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/ClientConcentrationsDetails-AccountsReceivableConcentrationByCustomer" xlink:title="999060 - Disclosure - CLIENT CONCENTRATIONS (Details - Accounts receivable concentration by customer)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/ClientConcentrationsDetailsNarrative" xlink:title="999061 - Disclosure - CLIENT CONCENTRATIONS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/SegmentInformationDetailsNarrative" xlink:title="999062 - Disclosure - SEGMENT INFORMATION (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://helio.space.com/role/EquityDetailsNarrative" xlink:title="999063 - Disclosure - EQUITY (Details Narrative)" />
</link:linkbase>
