#include <iostream>
using namespace std;
typedef long long ll;

ll gcd(ll n, ll m){
    if(n % m == 0) return m;
    return gcd(m, n % m);
}

int main()
{
    string x;
    cin >> x;
    int n = x.size();
    bool f = false;
    ll p = 0, q = 1;
    for(int i = 0; i < n; i++){
        if(x[i] == '.'){
            f = true;
            continue;
        }
        p = p * 10 + x[i] - '0';
        if(f) q *= 10;
    }
    ll g = gcd(p, q);
    cout << p / g << "/" << q / g << endl;
}