Calculated value field Database Insert

Hi,

I’m stuck on how to deal with Bubble on this matter that seems to be simple.
I fetch data from api call and i want to insert things into the DB with a calculated field value based on data field retreived by using a simple formula as you can see on the screen below. I got all the maths operators


but nothing that allow me to deal with a simple formula like this Total profit = (profit)/(balance-profit).
Any help would be appreciated as i’m not able to find the way to deal with this matter.
Thanks