import java.util.Scanner;

public class Demo2
{
   public static void main(String[] args) 
   {
      Scanner input = new Scanner(System.in);

      double length, width, area;
      
      System.out.print("Enter length: ");
      length = input.nextInt();
      System.out.print("Enter width: ");
      width = input.nextInt();

      if ( length >= 0 )
      {
         area = length * width;
         System.out.print(area);
      }
      else
         System.out.print("Illegal length");
   }
}