Writer, Formulas in a PDF form

I am trying to make a PDF form where a user can input a number in a text box (or whatever object is needed for this) and numbers are calculated and shown in other text boxes. Is this possible and what is the best what of going about this?

Version:, OS: Windows 7 Home Prem, 64bit

I’ll second this. I’m trying to figure out how to do the same.