255 decks in Blackjack

[PokerAmateur4]

One casino says they use "up to 255 decks" in their blackjack game, this is the blackjack game with realtimegaming. If I wanted to figure out the HA in wizards odds, how could I? It has an option for 1-8 decks but that's all.

[Spy Dog]

The difference between 8 and 255 decks will be negligible.