Since 1 US Dollar is equal to 53.999901 Russian Rubles, we could say that n United States Dollars are equal to 53.999901 times n Russian Rubles. In other words, we could use the following formula:
Russian Rubles = United States Dollars x 53.999901
For example, let's say that we want to convert 2 United States Dollars to Russian Rubles. Then, we just replace United States Dollars in the abovementioned formula with 2:
Russian Rubles = 2 x 53.999901
That is, 2 United States Dollars are equal to 107.999802 Russian Rubles.