In how many ways can four aces be drawn from a deck of cards? (Order is not important.)

Let's imagine that we have in the deck 52 cards. So what we need to do is to make a kind of "progression". So let me explain this by doing the procedure. we can use is like this:

4/52 * 3/51 * 2/50 * 1/49 =

24 / 6497400 =

1 / 270725

3.694e-6