There are 4 Aces and 4 Kings in a deck of cards.
Getting 3 aces out of 4 is c(4,3) = 4
Getting 2 kings out of 4 is c(4,2) = 6
Total ways of getting 3 aces and 2 kings is 4 * 6 = 24.
You are being dealt 5 cards out of the deck , the number of ways you can get 5 cards out of a deck of 52 cards is c(52,5) = 2,598,960
The probability of getting 3 aces and 2 kings being dealt 5 cards from the deck is 24 / 2,598,960 = 9.23446 * 10^-6 = (0.00000923446)