And so what you wanna do is you wanna divide this by the number of ways that five things can actually be ordered. So what you wanna do is divide this by the way that five things can be ordered. And if you're ordering five things, the first of the five things can take five different positions. Then the next one will have four positions left. Then the one after that will have three positions left. One after that will have two positions. And then the fifth one will be completely determined because you've already placed the other four.