How can i fix this deeply scratched game?

ok check me out, my little brother was toying around with this lamp, and he messed around and dropped it so when he dropped it he blowed the bulb and while i was playing me ncaa 09 on xbox 360 it told me the disc was un readable, and when i took it out it had a scratch that went around the cd......i dnt knw wat to do right now bt if u have any word (please help me!!!!!):(