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

namespace Harvest
{
    class Program
    {
        static void Main(string[] args)
        {
            double m2 = double.Parse(Console.ReadLine());
            double grapesm2 = double.Parse(Console.ReadLine());
            double target = double.Parse(Console.ReadLine());
            double workers = double.Parse(Console.ReadLine());

            double grapes = (m2 * grapesm2) * 0.4;
            double liters = grapes / 2.5;

            if(liters < target)
            {
                double diff = Math.Floor(target - liters);
                Console.WriteLine($"It will be a tough winter! More {diff} liters wine needed.");
            }

            if(liters >= target)
            {
                Console.WriteLine($"Good harvest this year! Total wine: {liters} liters.");
                Console.WriteLine($"{Math.Ceiling(liters - target)} liters left -> {Math.Ceiling(liters - target)/workers} liters per person.");
            }

        }
    }
}