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

int main(){
  cout << fixed << setprecision(10);
  string S;
  cin >> S;
  string A = "",B = "";
  for(int i=0;i<S.size();i++){
    if(S[i] == '/'){
      for(int j=i+1;j<S.size();j++) B += S[j];
      break;
    }
    else A += S[i];
  }
  int a = stoi(A);
  int b = stoi(B);
  double X = a;
  double Y = b;
  cout << X/Y << endl;
}