A gold a silver and a bronze medal are awarded in an Olympic

A gold, a silver, and a bronze medal are awarded in an Olympic event. In how many possible ways can the medals be awarded for a 200-meter sprint in which there are 9 runners?

first position can be taken by any one of the 9 runners
second position can be taken by any one of the remaining 8 runners
third position can be taken by any one of the remaining 7 runners
So, possible ways 9*8*7=504 ways or you can say 9P3=504 ways