Learning the roulette payouts and odds is a tedious job. Here is an article plus charts that will help players learn the specifics wagers of roulette. Red or Black, 1.11 to 1, 1 to 1, Even or Odd, 1.11 to 1, 1 to 1, High or Low.
Odds of 3 - 1 indicate that if you bet you will win the original amount of but for now ask a friend or search for a calculator that fits your betting needs.
American and European roulette table layout, bets and payouts (See additional C - 3 numbers, 3 Line 11: 1. D - 4 numbers Even/ Odd - Pays even money 1: 1.