using System;

class Program
{
    static void Main()
    {
        decimal numberA = decimal.Parse(Console.ReadLine());
        decimal numberB = decimal.Parse(Console.ReadLine());
        decimal numberC = decimal.Parse(Console.ReadLine());
        decimal numberD = decimal.Parse(Console.ReadLine());

        decimal total = (numberA / numberB) + (numberC / numberD);

        if (total >= 1)
        {
            Console.WriteLine(Math.Floor(total));
        }
        else
        {
            Console.WriteLine("{0:F22}", total);
        }

        decimal denominator = numberB * numberD;
        numberA *= (denominator / numberB);
        numberC *= (denominator / numberD);

        Console.WriteLine("{0}/{1}", numberA + numberC, denominator);
    }
}