So the number of hands with four 1's is actually just this number. You're actually looking at all of the different ways you can fill up the remaining cards. These four 1's are just going to be four 1's. There's only one way to get that. It's the remaining cards that's going to give all of the different combinations of having four 1's. So this will be a count of all of the different combinations. Because all of the different extra stuff that you have will be all of the different hands.