How do i make a form with a formule
look at the picture bellow
can somebody tell me HOW to do it?
thanks!
![How do i make a form with a formule look at the picture bellow can somebody tell me HOW to do it thanks class=](https://us-static.z-dn.net/files/d5f/9745b1b41ff19f86e31a57487e7ed8d6.png)