Position Possibilities

I remember there was a thread titled as "Is chess infinite?" Which was about the total amount of positions possible in chess. So I decided to count the possibilities of a position with just 2 Kings.

But before I count it, guess the total amount of positions possible with just 2 Kings.

Now the formula is:

[(64-1-3)*4] +[(64-1-5)*24]+[(64-1-8)*36]=3612!

Was your answer close to it? ;)

If you can understand the formula, then you are free to explain if anyone is confused. :)

If this is already confusing to you, imagine adding a White pawn into the position. ;)