I need help in my cod i don't no what is the proplom

Question

       int a, b, res;
       Scanner scan = new Scanner(System.in);

       System.out.print("Enter Two Numbers : ");
       a = scan.nextInt();
       b = scan.nextInt();

       res = a + b;
       System.out.println("Addition = " +res);

       res = a - b;
       System.out.println("Subtraction = " +res);

       res = a * b;
       System.out.println("Multiplication = " +res);

       res = a / b;
       System.out.println("Division = " +res);
    }
}

Answer 1

At first create a class and then declare main() inside that class. The write this function inside main(). It will run. The class and main() should look like this
class Test //You can give any name in place of Test
{
public static void main(String args[])
{
//Write your code here
}
}