#include <iostream>
#include <algorithm>
#include <iomanip>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <cassert>

#define debug_value(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << #x << "=" << x << endl;
#define debug(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << x << endl;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

using namespace std;
typedef long long ll;


template <typename T>
T gcd(T a, T b) {
	if (a < b) swap(a, b);
		while (b != 0) {
			T tmp = b;
			b = a % b;
			a = tmp;
		}
	return a;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << setprecision(10) << fixed;
    string s; cin >> s;
    bool f = false;
    for(char c : s){
        if(c == '.') f = true;
    }
    if(!f){
        cout << s << "/" << 1 << endl;
        return 0;
    }
    ll n = 0;
    ll d = 1;
    f = false;
    for(char c : s){
        if(c == '.') {
            f = true;
            continue;
        }
        if(f){
            d *= 10;
        }
        n = n*10+(c-'0');
    }
    ll g = gcd(n, d);
    cout << n/g << '/' << d/g << endl;
}