for VB 05 express.

I need to make a basic calculator. I'm having trouble with this, and it's due next monday, but I need to finish it asap.

I don't understand the formulas for the +,-,/, *

I have two text boxes, four buttons for the signs, and 3 labels. I don't even know where to begin with the variables.

Why can't I just make something simple as (when someone inputs the data into the text boxes, followed by clicking the "addition" button):
Me.lblAnswer.show(txtBox1 + txtBox2) and have that work out alright?

Please help me! I have no idea of the right coding.