What does it mean to buy an even number with five?

If you buy even numbers, you will get five, which means that if you buy even numbers, you will leave. That is, after buying what you want, in order to avoid suspicion and prevent cheating, people should keep their hands away from the bucket that shakes the dice. In the process of gambling, you should take your hands off the cards you choose to buy, so as not to regret, not change or cheat.