import java.util.Scanner;

public class HarvestAcho {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int area = Integer.parseInt(scanner.nextLine());
        double grape = Double.parseDouble(scanner.nextLine());
        int wineNeeded = Integer.parseInt(scanner.nextLine());
        int workers = Integer.parseInt(scanner.nextLine());

        double grapeTotal = area * grape;
        double wine = 0.4 * grapeTotal / 2.5;
        double wineLeft = wine - wineNeeded;
        double literPerWorker = wineLeft / workers;

        if (wine < wineNeeded) {
            double nedostig = wineNeeded - wine;
            System.out.printf("It will be a tough winter! More %.0f liters wine needed.", nedostig);

        } else {
            double dostatychno = wineNeeded - wine;
            System.out.printf("Good harvest this year! Total wine: %.0f liters.\n",wine);
            System.out.printf("%.0f liters left -> %.0f liters per person.",Math.abs(wineLeft),Math.abs(literPerWorker));
        }

    }
}