Since 1 US Dollar is equal to 209.165834 Guyanaese Dollars, we could say that n United States Dollars are equal to 209.165834 times n Guyanaese Dollars. In other words, we could use the following formula:
Guyanaese Dollars = United States Dollars x 209.165834
For example, let's say that we want to convert 2 United States Dollars to Guyanaese Dollars. Then, we just replace United States Dollars in the abovementioned formula with 2:
Guyanaese Dollars = 2 x 209.165834
That is, 2 United States Dollars are equal to 418.331668 Guyanaese Dollars.