Sorry, for some reason if the number is too high it says 'infinity' so try to stick with smaller numbers. It also doesn't work with decimals, other than zero point five. But it can do negative exponents. Scratch doesn't have a full precision calculator, so it will round a lot of decimals and any large numbers. :(
I actually made this because I was doing a math program and decided to make a simulator for 'to the power of'.