#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#include <time.h>
#include <stack>
#include <array>
#include <list>
#include <atcoder/all>
#define popcount __builtin_popcount
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef pair<int, int> P;

int main()
{
    string x; cin>>x;
    ll s=0;
    ll p=0;
    for(int i=0; i<x.size(); i++){
        if(x[i]=='.'){
            p=1;
            continue;
        }
        p*=10;
        s*=10;
        s+=x[i]-'0';
    }
    if(p==0) p=1;
    ll g=gcd(s, p);
    s/=g, p/=g;
    cout<<s<<"/"<<p<<endl;
    return 0;
}