Not quite
you will see a blackjack 34% of the time
a blackjack will hit 8.5% of the time
4 aces divided by 47 remaining cards = 8.5% using one deck, 8.1% using 2 decks
so if you play it out 100 times, thats 400 hands you hit on with a 10 = 32-34 blackjacks you will hit