#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){

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

    return 0;
}