Since 1 Euro is equal to 8.280412091521272 Hong Kong Dollars, we could say that n Euros are equal to 8.280412091521272 times n Hong Kong Dollars. In other words, we could use the following formula:
Hong Kong Dollars = Euros x 8.280412091521272
For example, let's say that we want to convert 2.0 Euros to Hong Kong Dollars. Then, we just replace Euros in the abovementioned formula with 2.0:
Hong Kong Dollars = 2.0 x 8.280412091521272
That is, 2.0 Euros are equal to 16.560824183042545 Hong Kong Dollars.