// Page 224

import java.util.Scanner;
public class Prog_14_1
{
	public static void main(String[] args)
	{
		Scanner input=new Scanner(System.in);
		try
		{
			System.out.print("Enter # of donuts: ");
			int dc = input.nextInt();
			System.out.print("Enter # of glasses of milk: ");
			int mc = input.nextInt();
			if(mc < 1)
			{
				Exception e = new Exception("Exception: No milk");
				throw e;
			}
			double dPerGm = dc/(double)mc;
			System.out.println(dc + " donuts.");
			System.out.println(mc + " glasses of milk.");
			System.out.println("\nYou have  " + dPerGm +" donuts for each glass of milk.\n\n\n");
		}
		catch (Exception e)
		{
			System.out.println("\n\n" + e.getMessage());
			System.out.println("Buy some milk.\n\n\n");
		}
		System.out.println("Byebye");
	}
}