/* -*- coding: utf-8 -*-
 *
 * 1902.cc:  No.1902 AC Ratio - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

char s[32];

/* subroutines */

int readint(char *(&cpt)) {
  int x = 0;
  while (*cpt >= '0' && *cpt <= '9')
    x = x * 10 + (*(cpt++) - '0');
  return x;
}

/* main */

int main() {
  scanf("%s", s);

  char *cpt = s;
  int a = readint(cpt);
  cpt++; // '/'
  int b = readint(cpt);

  printf("%.5lf\n", (double)a / b);
  return 0;
}