import java.util.Scanner;
class PersegiPanjang
{
   public static void main (String[] args)
   {
       Scanner scanner = new Scanner(System.in);
       System.out.println("Panjang :");
       double panjang = scanner.nextDouble();
       System.out.println("Lebar :");
       double lebar = scanner.nextDouble();
       double luas = panjang*lebar;
       System.out.println("Luas dari persegi panjang : " + luas);
   }
}