#include <bits/stdc++.h>
using namespace  std;
int main(){
 array<string,2>kigou;
 string S;
    int mid; //スラッシュの位置
    float before;
    float after;
 cin >> S;

 for(int i=0; i<S.length();i++) {
    if(S[i]=='/') {
         mid = i;
        break;
    }
 }

    kigou[0] = S.substr(0,mid);
    kigou[1] = S.substr(mid+1);

     before = stof(kigou[0]);
     after  = stof(kigou[1]);

    float num = before / after;
    cout << num << endl;
    //cout << kigou[0]<< endl;

    //cout << kigou[1]<< endl;
/* kigou[]
 int A = atoi(S.c_str());
 int B = atoi(S.c_str());
 float num = A / B;
 cout << num << endl;*/
}