#include <bits/stdc++.h>
using namespace std;
using lint = long long int;
using P = pair<int, int>;
using PL = pair<lint, lint>;
#define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++)
#define IFOR(i, begin, end) for(int i=(end)-1,i##_begin_=(begin);i>=i##_begin_;i--)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
#define ALL(a)  (a).begin(),(a).end()
constexpr int MOD = 1000000007;
constexpr lint B1 = 1532834020;
constexpr lint M1 = 2147482409;
constexpr lint B2 = 1388622299;
constexpr lint M2 = 2147478017;
constexpr int INF = 2147483647;
void yes(bool expr) {cout << (expr ? "YES" : "NO") << "\n";}
template<class T>void chmax(T &a, const T &b) { if (a<b) a=b; }
template<class T>void chmin(T &a, const T &b) { if (b<a) a=b; }
lint gcd(lint a, lint b) {
  if(a < b) {
    swap(a, b);
  }
  while(b > 0) {
    lint r = a % b;
    a = b;
    b = r;
  }
  return a;
}
int main()
{
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  string S;
  cin >> S;
  lint bunsi = 0;
  bool hasdot = false;
  REP(i, S.size()) {
    if(S[i] != '.') {
      bunsi *= 10;
      bunsi += S[i] - '0';
    } else hasdot = true;
  }
  lint bunbo = 1;
  if(hasdot) {
    IREP(i, S.size()) {
      if(S[i] == '.') break;
      bunbo *= 10;
    }
  }
  lint g = gcd(bunsi, bunbo);
  bunsi /= g;
  bunbo /= g;
  cout << bunsi << "/" << bunbo << endl;
}