using System;


namespace Harvest
{
    class Program
    {
        static void Main(string[] args)
        {
            var area = int.Parse(Console.ReadLine());
            var kg = double.Parse(Console.ReadLine());
            var wantedWine = int.Parse(Console.ReadLine());
            var workers = int.Parse(Console.ReadLine());
            var harvest = area * kg;
            var harvestWine = 0.4 * harvest;
            var liters = harvestWine / 2.5;
            if (liters<wantedWine)
            {
                var wineMore = Math.Floor(wantedWine - liters);
                Console.WriteLine("It will be a tough winter! More {0} liters wine needed. ", wineMore);
            }
            else
            {
                var litersLeft = Math.Ceiling(liters - wantedWine);
                var litersPerson = Math.Ceiling(litersLeft / workers);

                Console.WriteLine("Good harvest this year! Total wine: {0} liters.", Math.Floor(liters));
                Console.WriteLine("{0} liters left -> {1} liters per person.", litersLeft, litersPerson);
            }
       }
    }
}