#include <bits/stdc++.h>
template<class T> inline bool chmin(T&a, T b){if(a > b){a = b; return true;}else{return false;}}
template<class T> inline bool chmax(T&a, T b){if(a < b){a = b; return true;}else{return false;}}
#define ll long long
#define double long double
#define rep(i,n) for(int i=0;i<(n);i++)
#define REP(i,n) for(int i=1;i<=(n);i++)
#define mod (ll)(1e9+7)
#define inf (ll)(3e18+7)
#define eps (double)(1e-9)
#define pi (double) acos(-1)
#define P pair<int,int>
#define PiP pair<int,pair<int,int>>
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
using namespace std;

int main() {
    string x;
    cin >> x;
    int cnt = 0;
    if(x.find('.') == string::npos){
        x += ".";
    }
    int p = x.find('.');
    int s = x.size();
    rep(_, 8-(s-p-1))x += "0";
    x.erase(x.begin()+p);
    ll n = stoll(x), m = 100000000LL;
    ll g = __gcd(n, m);
    cout << n/g << "/" << m/g << endl;
}