//
//  ...
// Goal: mile <=> kile
//
import java.text.DecimalFormat;
import java.util.Scanner;
class ConvKM
{
	public static void main(String[] args)
	{
		DecimalFormat f1 = new DecimalFormat("0.0"); // p.32
		Scanner input = new Scanner(System.in);
		String anw;	// "m" or "k"

		System.out.print("Read a letter (m/k): ");
		anw = input.next();

		// debug
		//System.out.println("ANW = " + anw);

		if(anw.compareTo("m")==0)
		{
			System.out.print("m => k. Input the mile #: ");
			double tempM = input.nextDouble();
			double kile = tempM * 1.609344;
			System.out.println("The kilemeter: " + f1.format(kile));
		}
		else if (anw.compareTo("k")==0)
		{
			System.out.println("k => m");
		}
		else
			System.out.println("Invalid input");

		System.out.println("\n\nDone.\n\n");
	}
}