Well, it does like like a nice bit of code but kind of unneccesary. unless you run an accounting website or something

now, what would really be impressive is if you could make a scientific calc to implement or otherwise add features not found on a standard calculator. Maybe add in a few common equations and formulas allowing the users to fill in some of the variables and have it solve for 'x' or whatever.

this could be a nice addition to an architecture or 3-d CAD/animation type forum.

I see it as a good jumping off point to something alot bigger and better but as it is, it's not worth implementing.