Since 1 Hong Kong Dollar is equal to 0.668348206039529 Brazilian Reais, we could say that n Hong Kong Dollars are equal to 0.668348206039529 times n Brazilian Reais. In other words, we could use the following formula:
Brazilian Reais = Hong Kong Dollars x 0.668348206039529
For example, let's say that we want to convert 2.0 Hong Kong Dollars to Brazilian Reais. Then, we just replace Hong Kong Dollars in the abovementioned formula with 2.0:
Brazilian Reais = 2.0 x 0.668348206039529
That is, 2.0 Hong Kong Dollars are equal to 1.336696412079058 Brazilian Reais.