#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cstring>
#include <vector>
#include <map>
#include <algorithm>
#include <cctype>
#include <cmath>
#include <bitset>
#include <set>
#include <deque>
#include <stack>
#include <atcoder/all>
using namespace std;
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define rrep(i,n) for(int i = 1; i <= (n); ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
#define srep(i,s,t) for (int i = s; i < (t); ++i)
#define dsrep(i,t,s) for(int i = (t)-1; i >= (s); --i)
#define rng(a) a.begin(),a.end()
#define rrng(a) a.rbegin(),a.rend()
#define isin(x,l,r) ((l) <= (x) && (x) < (r))
int dx4[4]={1,0,-1,0};
int dy4[4]={0,-1,0,1};
using ll = long long;
using uint = unsigned;
using ull = unsigned long long;
using P = pair<int,int>;
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;
const ll mod = 998244353;


ll gcd(ll a, ll b) {
  if(b == 0) return a;
  return gcd(b, a % b);
}

ll lcm(ll a, ll b) {
  if(a < b) swap(a, b);
  return a * b / gcd(a, b);
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  string x;
  cin >> x;

  int s_count = 0;
  rep(i, x.size()) {
    if(x[i] == '.') {
      s_count = (x.size() - 1 - i);
    }
  }

  ll xx = 0;
  rep(i, x.size()) {
    if(x[i] != '.') {
      xx *= 10;
      xx += x[i] - '0';
    }
  }

  ll t = 1;
  while(s_count) {
    t *= 10;
    s_count--;
  }

  ll gc = gcd((ll)xx, (ll)t);
  cout << ((ll)xx / gc) << "/" << (t / gc) << endl;
}