Since 1 US Dollar is equal to 4.9237 Brazilian Reais, we could say that n United States Dollars are equal to 4.9237 times n Brazilian Reais. In other words, we could use the following formula:
Brazilian Reais = United States Dollars x 4.9237
For example, let's say that we want to convert 2.0 United States Dollars to Brazilian Reais. Then, we just replace United States Dollars in the abovementioned formula with 2.0:
Brazilian Reais = 2.0 x 4.9237
That is, 2.0 United States Dollars are equal to 9.8474 Brazilian Reais.