#include <bits/stdc++.h>
// #include <atcoder/all>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for(int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
// using namespace atcoder;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

// stringを10^keta倍してlongで返す
ll stringToLong(string s, ll keta){
    int n = s.size();
    int dot = -1;
    rep(i,n) if(s[i] == '.') dot = i;
    if(dot == -1){
        s += '.';
        n++;
        dot = n-1;
    }
    while(keta && dot<n-1){
        swap(s[dot],s[dot+1]);
        dot++;
        keta--;
    }
    ll res = 0;
    rep(i,n-1){
        res *= 10;
        res += s[i] - '0';
    }
    rep(i,keta) res *= 10;
    return res;
}

// long version
long long int GCD(long long int x, long long int y){
    if(x == 0 && y == 0) return 0;
    if(x>y){
        long long int swap = x;
        x = y;
        y = swap;
    }
    while(true){
        if(y%x==0){
            return x;
        }else{
            long long int amari = y%x;
            y = x;
            x = amari;
        }
    }
}

int main() {
    string sx; cin >> sx;
    ll x = stringToLong(sx, 10);
    ll y = 1;
    rep(i,10) y *= 10;
    ll g = GCD(x,y);
    x /= g;
    y /= g;
    cout << x << '/' << y << endl;
    return 0;
}