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();
        float area,perimeter;
        if(length<=0 || width<=0){
            System.out.println("Invalid input");
        }
        else{
            area = length*width;
            perimeter = 2*(length+width);
            System.out.println("%.1f",area);
            System.out.println("%.1f",perimeter);
        }
        sc.close();
    }
}