#include "bits/stdc++.h"
//#include "atcoder/all"
using namespace std;
//using namespace atcoder;
//using mint = modint1000000007;
//const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
//const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define endl "\n"
long long gcd(long long a, long long b) {
	if (b == 0) return a;
	else return gcd(b, a%b);
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	string X;
	cin >> X;
	int pos = X.find(".");
	if (std::string::npos == pos) {
		cout << X << "/1" << endl;
		return 0;
	}
	bool b = false;
	long long x = 0;
	long long y = 1;
	rep(i, X.size()) {
		if (X[i] == '.') { b = true; continue; }
		x *= 10;
		x += X[i] - '0';
		if (b) {
			y *= 10;
		}
	}

	cout << x / gcd(x, y) << "/" << y / gcd(x, y) << endl;
	return 0;
}