using System;

class rectangle

{

    public double Length;

    public double width;

    public double GetArea()

    {

        return Length * width;

    }

}           

public class Program

{

    public static void Main()

    {

        Double a = area(2,4);

        Console.WriteLine("Area = {0}", a);

    }

    public static double area(double Length, double width)

    {

        return (Length * width);

    }

}