/* -*- coding: utf-8 -*-
 *
 * 1464.cc:  No.1464 Number Conversion - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

/* typedef */

typedef long long ll;

/* global variables */

char s[64];

/* subroutines */

/* main */

int main() {
  scanf("%s", s);

  ll n = 0, d = 1;
  bool f = false;

  for (int i = 0; s[i]; i++) {
    if (s[i] == '.') f = true;
    else {
      n = n * 10 + (s[i] - '0');
      if (f) d *= 10;
    }
  }

  while (n % 2 == 0 && d % 2 == 0) n /= 2, d /= 2;
  while (n % 5 == 0 && d % 5 == 0) n /= 5, d /= 5;

  printf("%lld/%lld\n", n, d);
  return 0;
}