#include <iostream>
#include<map>
#include<set>
#include<vector>
#include<algorithm>
#include<numeric>
#include<math.h>
using ll = long long;
#define rep(i,n) for(int i = 0;i<n;i++)
#define req(i,n) for(int i = 1;i<=n;i++)
#define rrep(i,n) for(int i = n-1;i>=0;i++)
#define ALL(a) a.begin(),a.end()
using namespace std;
ll gcd(ll a, ll b) {
    return b ? gcd(b, a % b) : a;
}
int main(){
    long double a; ll t = 1e8; cin >> a; a += 0.000000001; a *= t;
    ll A = (ll)a, g = gcd(a, t);
    cout << A/g <<"/" << t/g << endl;
}