Now for each of those six possibilities, there'd be five possibilities of who we put here, because one person's already sitting down. Now for each of these 30 possibilities of seating these first two people, there'd be four possibilities of who we put in chair number three. And then for each of these, what is this, 120 possibilities, there would be three possibilities of who we put in chair four. And so this six times four times, six times five times four times three is the number of permutations. And we've seen in one of the early videos on permutations that, or when we talk about the permutation formula, one way to write this, if we wanted to write it in terms of factorial, we could write this as six factorial, six factorial, which is going to be equal to six times five times four times three times two times one. But we want to get rid of the two times one. So we're gonna divide that.