using System;

public class Program

{

    public static void Main()

    {

        Double a, z, result;

        Console.WriteLine("4.734a*45/21z");

        Console.WriteLine("a=");

        a =Convert.ToDouble(Console.ReadLine());

        Console.WriteLine("z=");

        z =Convert.ToDouble(Console.ReadLine());

        result = 4.734 * a * 45 / 21 * z;

        Console.WriteLine("4.734a*45/21z" + result);

    }

}