Stuff
public text v1 · immutable Sub Button1Click(ByVal sender As Object, ByVal e As EventArgs)
Dim PaymentText As New Double
Dim rate As New Double
Dim principal As New Double
Dim months As New Integer
rate = rate / 1200 + TextBox2.Text
principal = TextBox3.Text
months = TextBox4.Text
PaymentText = (rate + (rate / ((1 + rate) ^ months) - 1)) * principal
Label1.Text = PaymentText
End Sub