getting input values in php direct evaluation

[sandy771]

I want to code a php direct evaluation page that gets a value from a user, performs some calculations and then outputs the result

i.e. something like a centigrade to farenheit converter where a user enters centigrade value in a box, I calculate the equivalent farenheight and output the result below. Ideally both the input box and the result value would be on the same page, so that a subsequent value can be entered.

is this possible using VBulletin like this?