Well, there's 36 unique cards, so for that first slot, there's 36. But then that's now part of my hand. Now for the second slot, how many will there be left to pick from? Well, I've already picked 1, so there'll only be 35 to pick from, and then for the third slot, 34, and then it just keeps going, then 33 to pick from, 32, 31, 30, 29, and 28. So you might want to say that there are 36 times 35 times 34 times 33 times 32 times 31 times 30 times 29 times 28 possible hands. Now, this would be true if order mattered. This would be true if maybe I have card 15 here.