I understand this function on a basic level but need help with it in the following context:

Design a URM program that will compute f: N -> N; f(x) = floor(x/3)

The URM program part is fine with me but what is the output of this function? Can someone give me a few outputs for f(x) for say x = 1, 2, 3, 4, 5 at the least so I can get a better idea of things? Thanks a bunch!