Six different scenarios for who sits in chair number one. Now, for each of those six scenarios, how many people, how many different people could sit in chair number two? Well, in each of those six scenarios, we've taken one of the six people to sit in chair number one, so that means you have five out of the six people left to sit in chair number two. Or another way to think about it is there's six scenarios of someone in chair number one, and for each of those six, you have five scenarios for who's in chair number two. So you have a total of 30 scenarios where you have seated six people in the first two chairs. And now, if you want to say, well, what about for the three chairs? Well, for each of these 30 scenarios, how many different people could you put in chair number three?