I really should take the integral from there to there, but this little rectangle is a pretty good approximation. And this chart, I show you that as the total number of moves gets larger and larger, the difference between what the normal probability distribution tells us and the binomial probability distribution tells us gets smaller and smaller in terms of the probability of you ending up 10 moves to the right. And you can change this number here. Let me change it just to show you. You could say, what's the probability of being 15 moves to the right? And actually, no, that one doesn't. 15 moves to the right.