Since 1 US Dollar is equal to 5.2931 Brazilian Reais, we could say that n United States Dollars are equal to 5.2931 times n Brazilian Reais. In other words, we could use the following formula:
Brazilian Reais = United States Dollars x 5.2931
For example, let's say that we want to convert 2 United States Dollars to Brazilian Reais. Then, we just replace United States Dollars in the abovementioned formula with 2:
Brazilian Reais = 2 x 5.2931
That is, 2 United States Dollars are equal to 10.5862 Brazilian Reais.