pls answer these question

import java.io.*;
class rectangle{
    public static void main(String[] args)throws Exception{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        System.out.print("Enter Length: ");
        int l=Integer.parseInt(br.readLine());
        System.out.print("Enter Width: ");
        int b=Integer.parseInt(br.readLine());
        int area=l*b;
        int perimeter=(2*l)+(2*b);
        System.out.println("Area of Rectangle: "+area);
        System.out.println("Perimeter of Rectangle: "+perimeter);
    }
}