using System;

namespace Practice
{
    class Program
    {
        static void Main(string[] args)
        {
            double x = double.Parse(Console.ReadLine());
            double y = double.Parse(Console.ReadLine());
            double z = double.Parse(Console.ReadLine());
            int workers = int.Parse(Console.ReadLine());

            double totalGrapes = x * y;
            double wine = 0.4 * totalGrapes / 2.5;

            if (wine >= z)
            {
                double diff = wine - z;
                double litresPerPerson = diff / workers;

                Console.WriteLine($"Good harvest this year! Total wine: {wine} liters.");
                Console.WriteLine($"{diff} liters left -> {litresPerPerson} liters per person.");
            }
            else
            {
                double diff = Math.Round(z - wine);
                Console.WriteLine($"It will be a tough winter! More {diff} liters wine needed.");
            }
        }
    }
}