#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
//using mint = modint1000000007;
using mint = modint998244353;
template <typename T> bool chmax(T &u, const T z) { if (u < z) {u = z; return true;} else return false; }
template <typename T> bool chmin(T &u, const T z) { if (u > z) {u = z; return true;} else return false; }
#define ll long long
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
typedef pair<ll, int> P;
ll gcd(ll x, ll y) { return y ? gcd(y, x % y) : x; }
ll lcm(ll a, ll b){return a * b / gcd(a, b);}

int main(){
  string s,t;
  cin>>s;
  int cnt=0;
  bool hantei=false;
  rep(i,s.size()){
    if(hantei)cnt++;
    if(s[i]=='.')hantei=true;
    else t+=s[i];
  }
  ll bai=1;
  rep(i,cnt){
    bai*=10;
  }
  ll kazu=stol(t);
  ll waru=gcd(kazu,bai);
  ll bunsi=kazu/waru;
  ll bunbo=bai/waru;
  cout<<bunsi<<"/"<<bunbo<<endl;
  return 0;
}