Composite function

Write a composite function that represents the number of Japanese yen equivalent to x Russian rubles. Show your work?
Suppose the function f(x)=0.035x represents the number of U.S. dollars equivalent to x Russian rubles and the function g(x)=90x represents the number of Japanese yen equivalent to x U.S. dollars.

Suppose you have 1000 Russian rubles. How many dollars is this? Once you answer the last question, how many yens is this?

Suppose you have x Russian rubles. How many dollars is this? Once you answer the last question, how many yens is this?