using System;

public class Program

{

    public static void Main(string[] args)

    {

        float a, b, S, P;

        Console.WriteLine("a= ");

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

        Console.WriteLine("b= ");

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

        S = a * b; P = 2 * a + 2 * b;

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

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

    }

}