#include <bits/stdc++.h>
using namespace std;
int main(){
  string X;
  cin >> X;
  int N = X.size();
  int p = -1;
  for (int i = 0; i < N; i++){
    if (X[i] == '.'){
      p = i;
    }
  }
  if (p == -1){
    cout << X << "/" << 1 << endl;
  } else {
    X.erase(X.begin() + p);
    long long S = stoll(X);
    long long B = 1;
    for (int i = 0; i < N - 1 - p; i++){
      B *= 10;
    }
    long long g = gcd(S, B);
    S /= g;
    B /= g;
    cout << S << "/" << B << endl;
  }
}