Back End Calculator

Hello, im looking for a calculator that works in the back end and it shows the results on the profile page.

So for instance i will have 200x.75×200= ABC. This will be in the back end showing the result in of ABC in the front end where everyone can see it.

I would have to modify the back end amount at any time.

Does anybody know if theres a plugin for this?

Any help will be grateful.

Thanks