for a race of 500m find the no. of rounds one has to take on a circular track of radius 5m

Total distance = 500m
Radius of circular track = 5m

circumference of track = 2 x pie x r 
                                     = 2 x 22/7 x 5
                                     = 220/7 m
no. of rounds = distance/ circumference
                       = 500/220/7
                      = 500 x 7 /220
                      = 50 x 7 /22
                      = 350 / 22
                      = 16 rounds ( approx )

Correct me if I am wrong but, is there a fault in the question or have I done something wrong?
i cant seem to get a whole number as the answer.