#include <iostream>
#include <string>
using namespace std;
using ll = long long int;

ll mygcd(ll a, ll b){
    while(b != 0){
        ll r = a%b;
        a = b;
        b = r;
    }
    return a;
}

int main(){
    string n0;
    cin >> n0;

    ll d = 0;
    int i;
    for(i = 0; i < n0.length() && n0[i] != '.'; i++){
        d *= 10;
        d += n0[i]-'0';
    }
    i++;
    int fketa = 0;
    ll f = 0;
    for(; i < n0.length(); i++){
        fketa++;
        f *= 10;
        f += n0[i]-'0';
    }

    if(fketa == 0) cout << d << "/1" << endl;
    else{
        ll num = d;
        ll base = 1;
        for(int i = 0; i < fketa; i++){
            num *= 10;
            base *= 10;
        }
        num += f;

        ll g = mygcd(num, base);
        num /= g;
        base /= g;
        cout << num << "/" << base << endl;
    }
    return 0;
}