#pragma GCC optimize("O3")
//#pragma GCC target("avx2")
//#pragma GCC optimize("unroll-loops")

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ld> vld;
typedef pair<ll,ll> Pll;
typedef pair<int,int> Pin;

ll INF = 1e16;
int inf = 1e9;

#define ALL(x) (x).begin(), (x).end()
#define FOR(i, m, n) for (ll i = (m); i < (n); ++i)
#define REVFOR(i, m, n) for (ll i = (n - 1); i >= (m); --i)
#define REP(i, n) FOR(i, 0, n)
#define REVREP(i, n) REVFOR(i, 0, n)
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define bcnt __builtin_popcountll

#ifdef LOCAL
#include <prettyprint.hpp>
#define debug(...)  cerr << "[" << #__VA_ARGS__ << "]: ", d_err(__VA_ARGS__);
#else
#define debug(...) 83;
#endif

void d_err() {
    cerr << endl;
}

template <typename H, typename... T>
void d_err(H h, T... t) {
    cerr << h << " ";
    d_err(t...);
}

template <typename T>
void print(T x) {
    cout << x << "\n";
}

template <typename T>
void print(vector<T>& x) {
    int N = x.size();
    REP(i, N) {
        if (i > 0) cout << " ";
        cout << x[i];
    }
    cout << "\n";
}

// return primes between [2, n]
void SOE(ll n, vll& p) {
    vll s(n + 5);
    REP(i, s.size()) s[i] = i;

    p.eb(2);
    for (ll j = 4; j <= n; j += 2) {
        s[j] = 2;
    }

    for (ll i = 3; i <= n; i += 2){
        if (s[i] != i) continue;
        p.pb(i);
        for (ll j = i+i; j <= n; j += i) {
            s[j] = i;
        }
    }
}

int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(20);

    string xin; cin >> xin;

    ll d = 1;
    int cmax = 0;
    ll x = 0;
    bool f = false;
    for (auto &e: xin) {
        if (e == '.') {
            f = true;
            continue;
        }

        x *= 10;
        x += e - '0';
        if (f) d *= 10, cmax++;
    }

    int c2 = 0;
    while(x % 2 == 0 && c2 < cmax) {
        x /= 2;
        d /= 2;
        c2++;
    }

    int c5 = 0;
    while(x % 5 == 0 && c5 < cmax) {
        x /= 5;
        d /= 5;
        c5++;
    }

    cout << x;
    cout << "/";
    cout << d;
    print("");
}