import java.io.*;

public class quiz2_solution
{
    public static void main (String[] args)
        throws IOException
    {
        System.out.print ("Enter speed in kmph: ");

        InputStreamReader reader =
            new InputStreamReader (System.in);

        BufferedReader input =
            new BufferedReader (reader);

        String kmph_string = input.readLine ();

        double kmph = new Double (kmph_string).doubleValue ();

        double mph = kmph / 1.6;

        System.out.println (kmph + " kmph equals " +
                            mph + " mph");
    }
}