#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;
using mint = modint998244353;

int main() {
  double x; cin >> x;
  string s = to_string(x);
  int pos = s.find('.');
  int d = 0;
  if (pos == -1) d = 0;
  else d = s.size() - pos - 1;
  ll a = pow(10, d);
  double y = x * pow(10, d);
  ll b = ll(y);
  ll g = gcd(a, b);
  cout << b / g << '/' << a / g << endl; 
  return 0;
}