In blackjack, your cards need to total closer to 21 than the dealer without going over (busting).
At live blackjack casinos, blackjack is played with eight standard 52-card decks. Each card denomination is assigned a point value, with the point value of each card of your hand being added together to calculate your total. Cards 2 to 10 are worth their face value. Kings, queens and jacks are worth 10 each, and aces may be used as either 1 or 11.
A winning payout is one to one with a €5 bet paying out €5. A two-card 21 is the best total you can get in blackjack and pays out three to two, meaning that if you bet €5 you will win €7.50.