using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _2D_RectangleArea
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("x1= ");
            var x1 = double.Parse(Console.ReadLine());
            Console.Write("y1= ");
            double y1 = double.Parse(Console.ReadLine());
            Console.Write("x2= ");
            double x2 = double.Parse(Console.ReadLine());
            Console.Write("y2= ");
            double y2 = double.Parse(Console.ReadLine());
            double area = (x1 - x2) * (y2 - y1);
            double perimeter = 2 * ((x1 - x2) + (y2 - y1));
            {
                Console.WriteLine("Area= " + Math.Abs(area));
                Console.WriteLine("Perimeter= " + Math.Abs(perimeter));
            }
        }
    }
}