Since 1 Euro is equal to 21455.163916863083 Belarusian Rubles, we could say that n Euros are equal to 21455.163916863083 times n Belarusian Rubles. In other words, we could use the following formula:
Belarusian Rubles = Euros x 21455.163916863083
For example, let's say that we want to convert 2.0 Euros to Belarusian Rubles. Then, we just replace Euros in the abovementioned formula with 2.0:
Belarusian Rubles = 2.0 x 21455.163916863083
That is, 2.0 Euros are equal to 42910.327833726165 Belarusian Rubles.