What is the Probability of getting 4 aces in a row out of a full 6 deck pack are. 312 cards containing 24 aces?

It just because last night playing blackjack got 2 aces as starter cards, split them and got another 2 aces on both of them so 4 out of 4 of our first cards were aces out of a new shuffled deck, can anyone understand and figure out what the probability of doing that is out of 312 cards and 24 aces being there. Might be too hard/complicated i dunno.