I want to create a mathematical formula plugin for my website where users will enter their own numbers based on the formula in an html form style.

The formula is (a)*(b)^2/800

I want their to be a box for users to submit their data which will be (a) & (b) and then a box below showing the calculation. Also buttons giving the users the option to "calculate" and "clear fields".

Is there a website where I could input the formula and they could generate the coding?