Jim Kirk is good at maths

[thetaomega.livejournal.com]

I can't remember much of this fic, what I can remember is that Kirk is a genius/very intelligent and he has a competition against Chekov about who can solve a maths question the fastest. The rest of the crew place bets on who's going to win. In the end Chekov completes it first but then Spock goes up to Jim and calls him on writing slower than usual and letting Chekov win.
Any help you can give me would be fantastic!