INF = 10 ** 9
import sys
sys.setrecursionlimit(100000000)
dy = (-1,0,1,0)
dx = (0,1,0,-1)
from  collections import deque

def main():
    a,b,c = map(int,input().split())
    print(a/b*c)
if __name__ == '__main__':
    main()