The lower right cell shows a house edge of 2.70%.
The reason for dividing by four is to show the return compared to the total four-unit bet. The return column is the product of the probability, win, and ¼. The following table shows the overall return table for a bet of four units. It is achieved by dividing the total wager into the following bets: It is a way of covering the seven numbers from 12 to 15 on the wheel. Jeu Zero translates to “game zero” in English. Following is some roulette terminology to help explain how the sector bets are comprised: While these bets could be made by hand, a table that allows sector betting will conveniently divide up a single wager into the requisite smaller wagers to cover a sector. Each sector bet is a combination of conventional bets that cover a particular sequence of numbers on the wheel. Some single-zero roulette wheels allow a convenient way to bet on a large sector of wheel.
