Since 1 Namibian Dollar is equal to 3.6890629252 Russian Rubles, we could say that n Namibian Dollars are equal to 3.6890629252 times n Russian Rubles. In other words, we could use the following formula:
Russian Rubles = Namibian Dollars x 3.6890629252
For example, let's say that we want to convert 2 Namibian Dollars to Russian Rubles. Then, we just replace Namibian Dollars in the abovementioned formula with 2:
Russian Rubles = 2 x 3.6890629252
That is, 2 Namibian Dollars are equal to 7.3781258504 Russian Rubles.