If a team was at +140, that means you only have to riskR$1 to winR$1.40 orR$100 to winR$140. The key thing to keep in mind is that the payouts are constant regardless of how much you bet. To figure out the exact amount of risk/return, just divide the moneyline by 100.
The number that follows the negative symbol (the odds) reveals how much to bet for everyR$100 you want to win. For example, as explained above, if the team you're betting has -110 odds, you need to wagerR$110 to winR$100. If your team has -150 odds, you must riskR$150 to winR$100.