using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("praougalnik S i P resheniq");

        Console.WriteLine("a = ");

        double a = double.Parse(Console.ReadLine());

        Console.WriteLine("b = ");

        double b = double.Parse(Console.ReadLine());

        Console.Write("S = ");

        Console.WriteLine (a * b);

        Console.Write("P = ");

        Console.WriteLine ((a*2)+(b*2));

    }

}