#include <bits/stdc++.h>
using namespace std;
#define int long long
#define double long double
signed main(){
  string N;
  cin>>N;
  int bunshi = 0;
  int bunbo = 1;
  bool dot = false;
  for(int i=0;i<N.size();i++){
      if(N[i] == '.'){
        dot = true;
        continue; 
      }
      else{
          bunshi *= 10;
          bunshi += (N[i]-'0');
      }
      if(dot) bunbo *= 10;
  }
  int a=bunshi;int b=bunbo;
  cout<<bunshi/gcd(a,b)<<'/'<<bunbo/gcd(a,b)<<endl;
}