import sys #input = sys.stdin.readline #input = sys.stdin.buffer.readline #文字列はダメ #sys.setrecursionlimit(1000000) #import bisect #import itertools #import random #from heapq import heapify, heappop, heappush #from collections import defaultdict #from collections import deque #import copy #import math #from functools import lru_cache #@lru_cache(maxsize=None) #MOD = pow(10,9) + 7 #MOD = 998244353 #dx = [1,0,-1,0] #dy = [0,1,0,-1] #dx8 = [1,1,0,-1,-1,-1,0,1] #dy8 = [0,1,1,1,0,-1,-1,-1] #dx = [1,1,-1,-1] #dy = [1,-1,1,-1] import decimal def main(): A,B = map(int,input().split("/")) #print(A,B) A = decimal.Decimal(A) B = decimal.Decimal(B) ans = A / B print("{:.10f}".format(ans)) if __name__ == '__main__': main()