01. Peace Of Cake

//http://bgcoder.com/Contests/105/Telerik-Academy-Exam-1-5-December-2013-Evening

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

namespace _01.PeaceOfCake
{
    class PeaceOfCake
    {
        static void Main(string[] args)
        {
            long a = long.Parse(Console.ReadLine());
            long b = long.Parse(Console.ReadLine());
            long c = long.Parse(Console.ReadLine());
            long d = long.Parse(Console.ReadLine());

            decimal nominator = a * d + c * b; //числител
            decimal denominator = b * d; // знаменател
            decimal sum = nominator / denominator;


            if (sum>=1)
            {
                Console.WriteLine((long)sum);
                Console.WriteLine("{0}/{1}",nominator ,denominator);
            }
            else
            {
                Console.WriteLine("{0:F22}", (decimal)sum);
                Console.WriteLine("{0}/{1}", nominator, denominator);
            }
        }
    }
}