This is for those of you that already got your Droids. One of the things that I will use a lot at work is the calculator. So I was wondering how good is the calculator on the Droid, is it a full function one like you would buy in the store, or is it a worthless one like on my dumb phone that can only add 1 +1. Can it do percentage and other regular calculator functions? I want to eliminate having to carry a calculator in my pocket in addition to the phone. Thanks for the info.