#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main(){
    double n;
    cin >> n;
    ll a = 1;
    ll b = 1;
    while(1){
        ll nl = floor(n);
        if((double)(n) == (double)(nl))break;
        b *= 10;
        n *= 10;
    }
    a = n;
    ll ra = a / __gcd(a,b);
    ll rb = b / __gcd(a,b);
    cout << ra << "/" << rb << endl;
}