Since 1 US Dollar is equal to 210.946572 Guyanaese Dollars, we could say that n United States Dollars are equal to 210.946572 times n Guyanaese Dollars. In other words, we could use the following formula:
Guyanaese Dollars = United States Dollars x 210.946572
For example, let's say that we want to convert 2.0 United States Dollars to Guyanaese Dollars. Then, we just replace United States Dollars in the abovementioned formula with 2.0:
Guyanaese Dollars = 2.0 x 210.946572
That is, 2.0 United States Dollars are equal to 421.893144 Guyanaese Dollars.