#include <iostream>
#include <numeric>
#include <string>

using namespace std;
using lint = long long;

void solve() {
    string s;
    cin >> s;

    lint num = 0, den = 0;
    for (auto c : s) {
        if (c == '.') {
            den = 1;
        } else {
            int d = c - '0';
            num = num * 10 + d;
            den *= 10;
        }
    }
    if (den == 0) den = 1;

    auto g = gcd(num, den);
    num /= g, den /= g;

    cout << num << "/" << den << "\n";
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    solve();

    return 0;
}