Dividing it by 3 times 2 times 1. 3 times 2 times 1. And which gives us, in the numerator, 120 divided by 6. It's 60 divided by 6. This is 60. 5 times 4 times 3 is 60. It gives us 60 divided by 6, which gives us 10 possibilities that gives us exactly three heads.