多乘二 ？

Private Sub Command1_Click()
Dim c1 As Integer
Dim c2 As Integer
Dim a() As Byte
Dim b As String
Dim changdu As Long, i As Long
changdu = Len(Text1.Text)
ReDim a(changdu)
For i = 1 To changdu
    b = Mid(Me.Text1.Text, 1, 1)
    a(i) = Int(Val(b))
Next i
b = Me.Text2.Text
c = Int(Val(b))
Dim rm As Byte
Dim r() As Byte
ReDim r(changdu)
Dim d As Byte
For i = changdu To 1 Step -1
rm = a(i) * c1 + d
r(i) = rm Mod 10
d = rm \ 10
Next i
b = Me.Text2.Text
b = Mid(b, 2, 1)
c2 = Int(Val(b))
d = 0
Dim rr() As Byte
ReDim rr(changdu)
For i = changdu To 1 Step -1
rm = a(i) * c2 + d
rr(i) = rm Mod 10
d2 = rm \ 10
Next i
If d2 <> 0 Then
   Print d2
End If
For i = 1 To changdu
    Print rr(i)
Next i

For i = changdu - 1 To 1 Step -1
    rm = r(i) + rr(i + 1) + d
    r(i) = rm Mod 10
    d = rm \ 10
Next i
rm = rr(1) + d1 + d
d1 = rm Mod 10
d = rm \ 10
d = d2 + d
Print
Print d & d1
For i = 1 To changdu
Print r(i)
Next i
d1 = rr(1) + d
End Sub