And then this one, similarly, is 10 factorial over 1 factorial over 10 minus 1 factorial, and that's how I get that one. And once again, if you click on the actual cell, you'll see that explained. So we've done this multiple times, it's just the binomial calculation. And then right here, after this line right here, you can almost ignore it. And I did that so that I can do a bunch of different scenarios. So for example, if I were to go to my spreadsheet, and instead of doing 10 steps, I wanted to do 20 steps, then everything changes. And that's why down here, after you get to a certain point, the whole thing just repeats.