using System;

public class Program

{

    public static void Main()

    {

        float ans = 0;

        Console.WriteLine("==================================");

        Console.WriteLine("{0,38}" ,"MENU");

        Console.WriteLine("==================================");

        Console.WriteLine("Press c or C : Find Area of Circle");

        Console.WriteLine("Press s or S : Find Area of Square");

        Console.WriteLine("==================================");

        Console.Write("Input your choice : ");

        char choice = char.Parse(Console.ReadLine());

        if (choice == 'c' || choice == 'C')

        {

            Console.WriteLine("\nYou choose \"Circle\" ");

            Console.Write("Input radius : ");

            float r = float.Parse(Console.ReadLine());

            ans = (float)(System.Math.PI * System.Math.Pow(r,2));

        }

        else if (choice == 's' || choice == 'S')

        {

            Console.WriteLine("\nYou choose \"Square\" ");

            Console.Write("Input width : ");

            float w = float.Parse(Console.ReadLine());

            Console.Write("Input length : ");

            float h = float.Parse(Console.ReadLine());

            ans = w * h;

        }

        Console.WriteLine("==================================");

        Console.WriteLine("Area = {0:0.00}" ,ans);

        Console.WriteLine("==================================");

    }

}