Sub ginti()
Dim Source As Range
Set Source = Selection
q = Source.Text
'Source.Value = 3
'Source.Value = 4
    With Source
        .Value = 1
        .AutoFill .Resize(q, 1), xlFillSeries
    End With
End Sub

Sub mdInsulationCheck()
    Dim Source As Range
   ' Dim iCol As Long
    Dim nCol As Long
    Dim iRow As Long
    Dim nRow As Long
    Dim total As Double
    
    Set Source = Selection
    nCol = Source.Columns.Count
    nRow = Source.Rows.Count
    
    For iRow = 1 To nRow
        x = Source.Rows(iRow).Columns(1).Address
        x2 = Source.Rows(iRow).Columns(nCol).Address
        sumx = Source.Rows(iRow).Columns(1 - 4).Address
        sumx2 = Source.Rows(iRow).Columns(0).Address
        Range(sumx & ":" & sumx2).Select
        tempSum = WorksheetFunction.Product(Selection)
        
        For tempcol = 1 To nCol
            If (Source.Rows(iRow).Columns(tempcol).Value = tempSum Or Source.Rows(iRow).Columns(tempcol).Value = "") Then
            Else
             Range(Source.Rows(iRow).Columns(tempcol).Address).Select
             Selection.Interior.Color = RGB(255, 100, 100)
             MsgBox "ERROR in " & Source.Rows(iRow).Columns(tempcol).Address
             Exit Sub
            End If
        Next tempcol
    Next iRow
    MsgBox "Calculation is OK"
End Sub