#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include <iomanip>
using namespace std;

int main(){
    int p;
    float a, b;
    string s;
    cin >> s;
    p = s.find("/");
    a = stof(s.substr(0, p));
    b = stof(s.substr(p+1));
    cout << fixed << setprecision(4) << a/b << endl;
}