And that equals, let's see, 6 times 5 times 4 times 3 times 2, we don't have to write the 1 times 1, I'll do it anyway. Over 4 factorial, 4 times 3 times 2 times 1, and then 2 factorial, 2 times 1. So that cancels with that. The 1 we can ignore. 2, divide both sides by, the numerator and denominator by 2, and this becomes a 3. So this becomes 15. So this equals 15 times 1 half to the 6th.