Since 1 Guyanaese Dollar is equal to 0.661765186249099 Japanese Yens, we could say that n Guyanaese Dollars are equal to 0.661765186249099 times n Japanese Yens. In other words, we could use the following formula:
Japanese Yens = Guyanaese Dollars x 0.661765186249099
For example, let's say that we want to convert 2.0 Guyanaese Dollars to Japanese Yens. Then, we just replace Guyanaese Dollars in the abovementioned formula with 2.0:
Japanese Yens = 2.0 x 0.661765186249099
That is, 2.0 Guyanaese Dollars are equal to 1.323530372498198 Japanese Yens.