印出兩個 N * N 矩陣的乘積。

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim a, b
        a = Val(TextBox1.Text)
        b = Val(TextBox2.Text)
        TextBox3.Text = a * b
    End Sub
End Class