using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Numerics;

namespace _01_AMericanPie
{
    class Program
    {
        static void Main(string[] args)
        {
            BigInteger A = BigInteger.Parse(Console.ReadLine());
            //int A = 2;   BigInteger
            BigInteger B = BigInteger.Parse(Console.ReadLine());
            //int B = 4;   BigInteger
            BigInteger C = BigInteger.Parse(Console.ReadLine());
            //int C = 2;   BigInteger
            BigInteger D = BigInteger.Parse(Console.ReadLine());
            //int D = 3;

            BigInteger G = B * D;
            BigInteger nominatorAAdd = G / B;
            A = A * nominatorAAdd;

            BigInteger nominatorCAdd = G / D;
            C = C * nominatorCAdd;

            BigInteger F = A + C;

            BigInteger numberOfFullPies = F / G;

            if (numberOfFullPies > 0)
            {
                Console.WriteLine(numberOfFullPies);
                Console.WriteLine("{0}/{1}", F, G);
            }

            else if (numberOfFullPies == 0)
            {
                decimal halfPie = (decimal)F / (decimal)G;
                Console.WriteLine("{0:F20}", halfPie);
                Console.WriteLine("{0}/{1}", F, G);

            }

        }
    }
}