Since 1 Guyanaese Dollar is equal to 0.63790735886 Japanese Yens, we could say that n Guyanaese Dollars are equal to 0.63790735886 times n Japanese Yens. In other words, we could use the following formula:
Japanese Yens = Guyanaese Dollars x 0.63790735886
For example, let's say that we want to convert 2 Guyanaese Dollars to Japanese Yens. Then, we just replace Guyanaese Dollars in the abovementioned formula with 2:
Japanese Yens = 2 x 0.63790735886
That is, 2 Guyanaese Dollars are equal to 1.27581471772 Japanese Yens.