If I have 9 cards, and I'm going to pick one of 9 to be in the first slot, well, that means I have 9 ways to put something in the first slot. Then in the second slot, I have 8 ways of putting a card in the second slot, because I took 1 to put in the first, so I have 8 left, then 7, then 6, then 5, then 4, then 3, then 2, then 1. That last slot, there's only going to be one card left to put in it. So this number right here, where you take 9 times 8 times 7 times 6 times 5 times 4 times 3 times 2 times 1, or 9, you start with 9, and then you multiply it by every number less than 9, every, I guess we could say, natural number less than 9, this is called 9 factorial. And you express it as an exclamation mark. So if we want to think about all of the different ways that we can have all of the different combinations for hands, this is the number of hands, if we cared about the order, but then we want to divide by the number of ways we can order things so that we don't overcount. And this will be an answer.