using static System.Math;
using System;

public class Hello
{
    static void Main()
    {
        var s = Console.ReadLine().Trim();
        var p = s.IndexOf('.');
        if (p == -1) Console.WriteLine(s + "/1");
        else getAns(s, p);
    }
    static void getAns(string s, int p)
    {
        var s2 = s.Replace(".", "");
        var t1 = long.Parse(s2);
        var t2 = (long)Pow(10, s.Length - (p + 1));
        var gcd = Gcd(t1, t2);
        t1 /= gcd;
        t2 /= gcd;
        Console.WriteLine("{0}/{1}", t1, t2);
    }
    public static long Gcd(long a, long b)
    {
        if (a < b) return Gcd(b, a);
        while (b != 0)
        {
            var w = a % b;
            a = b;
            b = w;
        }
        return a;
    }
}