#include <iostream>
#include <cassert>
#include <iomanip>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  string s; cin >> s;
  string A, B;
  bool toa = true;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == '/') {
      toa = false;
      continue;
    }
    if (toa) A += s[i];
    else B += s[i];
  }
  assert(A.size() > 0 && B.size() > 0);
  int aa = stoi(A), bb = stoi(B);
  cout << fixed << setprecision(16) << (double)aa / bb << endl;
  return 0;
}