Well, two people haven't sat down yet, so there's two possibilities. So now there's five times four times three times two scenarios of seating the first four seats. And for each of those, how many possibilities are there for the fifth seat? Well, for each of those scenarios, we only have one person who hasn't sat down left, so there's one possibility. And so the number of permutations, the number of, let me write this down, the number of permutations, permutations of seating these five people in five chairs is five factorial. Five factorial, which is equal to five times four times three times two times one, which of course is equal to, let's see, 20 times six, which is equal to 120. And we've already covered this in a previous video.