import java.util.Scanner;
public class Rectangle{
    public static void main(String[]args){
        Scanner sc = new Scanner(System.in);
        float length = sc.nextFloat();
        float width = sc.nextFloat();
        if(length<=0 || width<=0){
            System.out.println("Invalid input");
        }
        else{
            System.out.println("%.1f/n",length*width);
            System.out.println("%.1f/n",2*(length+width));
        }
        sc.close();
    }
}