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Private Sub cmd407_Click()
Dim tx1407(3, 3) As Double
Dim tx2407(3, 3) As Double
Dim tx3407(3, 3) As Double
Dim i As Integer
Dim j As Integer
Dim n As Integer
For i = 1 To 3
For j = 1 To 3
For n = 1 To 3
tx3407(i, j) = tx3407(i, j) + tx1407(i, n) * tx2407(n, j)
Next
Next
Next
End Sub
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