How to solve this problem?

what is the output of this recursion problem?

6. System.out.println(number + "contains "+numberOfZeros(number)+" What is the output of the following program? 1. public class RecursionDemo2 3. public static void main(String[] args) 2. { 4. { 5. int number = 40501; zeros."); 7.) 8. *** 9. *Precondition: n >= 0) 10. *Returns the number of zero digits in n. 11. **** 12. public static int numberOfZeros(int n) 13. { 14. if (n=0) 15. return 1; 16. else if (n