There are 52 cards in the complete deck, and only one of them is the ace of spades.
-- On the first draw, the probability of drawing the ace of spades is 1/52 .
Then there are only 51 cards left in the deck.
-- On the second draw, the probability of drawing the ace of hearts is 1/51.
-- The probability of both events is
(1/52) x (1/51) = 1/2652 = about 0.038% .