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));
        if (t1 % t2 == 0) { Console.WriteLine("{0}/1", t1 / t2); return; }
        if (t2 % t1 == 0) { Console.WriteLine("1/{0}", t2 / t1); return; }
        var imax = (int)Sqrt(Min(t1, t2)) + 1;
        for (int i = 2; i <= imax; i++)
        {
            while (true)
            {
                if (t1 % i == 0 && t2 % i == 0)
                {
                    t1 /= i;
                    t2 /= i;
                }
                else break;
            }
        }
        Console.WriteLine("{0}/{1}", t1, t2);
    }
}