#include "bits/stdc++.h"
//#define int long long
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
const ll INF = (1LL << 61);
ll mod = 1000000007;
ll gcd(ll a, ll b) {
	if (b == 0)return a;
	return gcd(b, a % b);
}
ll lcm(ll a, ll b) {
	ll g = gcd(a, b);
	return a / g * b;
}
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	double x; cin >> x;
	ll now = (ll)(x * 100000000.0 + 0.5);
	ll tmp = 100000000;
	ll l = gcd(now, tmp);
	now /= l; tmp /= l;
	cout << now<<"/" << tmp << endl;
	return 0;
}