Since 1 Brazilian Real is equal to 0.2048928410441339 United States Dollars, we could say that n Brazilian Reais are equal to 0.2048928410441339 times n United States Dollars. In other words, we could use the following formula:
United States Dollars = Brazilian Reais x 0.2048928410441339
For example, let's say that we want to convert 2.0 Brazilian Reais to United States Dollars. Then, we just replace Brazilian Reais in the abovementioned formula with 2.0:
United States Dollars = 2.0 x 0.2048928410441339
That is, 2.0 Brazilian Reais are equal to 0.4097856820882678 United States Dollars.