2DRecForum

using System;

class Training
{
    static void Main()
    {
        //Console.Write("x1 = ");
        var x1 = double.Parse(Console.ReadLine());
        //Console.Write("x2 = ");
        var x2 = double.Parse(Console.ReadLine());
        //Console.Write("y1 = ");
        var y1 = double.Parse(Console.ReadLine());
        //Console.Write("y2 = ");
        var y2 = double.Parse(Console.ReadLine());
        var num1 = x1 - y1;
        var num2 = y2 - x2;
       // Console.Write("The area is = ");
        var area = num1 * num2;
        Console.WriteLine(Math.Abs(area));
        //Console.Write("Perimeter is = ");
        var perimeter = (Math.Abs(num1) + Math.Abs(num2)) * 2;
        Console.WriteLine(perimeter);
    }
}