99-48

 

'48.計算兩個相當長之整數的乘積，如 1234567890123 * 1234567890123。
Public Class Form1
    Dim a, b As Long
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        a = Val(TextBox1.Text)
        b = Val(TextBox2.Text)
        TextBox3.Text = a * b
    End Sub
End Class