import java.util.*;
class Rectangle
{
   float l;
   float w;
   Rectangle(float l,float w)
       {
           this.l=l;
           this.w=w;
       }
       void area()
       {
           System.out.println(.1%f(l*w));
       }
       void perimeter()
       {
           System.out.println(2*(l+w));
       }
}
public class Main
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        // Rectangle r =new Rectangle(l,w);
        float l=sc.nextFloat();
        float w=sc.nextFloat();
        if(l<0 || w<0)
        {
            System.out.println("Invalid input");
            return;
        }
        Rectangle r =new Rectangle(l,w);
        r.area();
        r.perimeter();
    }
}