Predict the output of following Java Program?

public class Calculator 
{ 

    int num = 100; 

    public void calc(int num) { this.num = num * 10; } 

    public void printNum() { System.out.println(num); } 

  

    public static void main(String[] args) 

    { 

        Calculator obj = new Calculator(); 

        obj.calc(2); 

        obj.printNum(); 

    } 
}