A Trixie system consists of 4 bets which transpire from 3 picks.
• Three 2-pick multis (parlays)
• One 3-pick multi (parlay).
To calculate the winnings of each bet, multiply the stake of each individual bet and not your total stake amount. If, for instance, your total stake is R$20, the stake of each individual bet will be R$5 (5 x 4 bets = R$20), so you can calculate the amount accordingly.
For further information on the trixie system, you can visit the Betting Rules section, paragraph 2.24.