using System;

public class Program

{

    public static void Main()

    {

        double a = 0;

        double b = 0;

        double P = 0;

        double S = 0; 

        Console.WriteLine("a=");

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

        Console.WriteLine("=b");

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

        Console.WriteLine("P=");

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

        Console.WriteLine("S=");

        Console.WriteLine(S = a * b);

    }

}