#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() {
  string x, t; cin >> x;
  int n = x.size();
  int p = 0;
  for (int i = 0; i < n; i++) {
    if (x[n - i - 1] == '.') {
      p = i;
      continue;
    }
    t += x[n - i - 1];
  }
  reverse(t.begin(), t.end());
  ll b = stoll(t);
  ll a = 1;
  for (int i = 0; i < p; i++) a *= 10;
  ll g = gcd(a, b);
  cout << b / g << '/' << a / g << endl; 
  return 0;
}