#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define fi first
#define se second
#define all(a) a.begin(),a.end()
int main(){
  string s,a,b;
  cin >> s;
  int n=s.size();
  bool flag=true;
  for(int i=0; i<n; ++i){
    if(s[i]=='/'){
      flag=false;
      continue;
    }
    if(flag) a+=s[i];
    else b+=s[i];
  }
  long double na=stoi(a),nb=stoi(b);
  long double ans=na/nb;
  cout << fixed << setprecision(10) << ans << "\n";
  return 0;
}