#include <bits/stdc++.h>
using namespace std;

int main(){
  string S;
  cin >> S;
  
  int pos;
  for(int i = 0; i < S.size(); i++){
    if(S[i] == '/') pos = i;
  }
  
  double A = stoi(S.substr(0, pos));
  double B = stoi(S.substr(pos + 1));
  cout << A / B;
}