Here is a hint – Take another look at how this user story is implemented:
// User Story #2: My calculator should contain 10 clickable
// elements containing one number each from 0-9, with the following corresponding IDs:
// id="zero", id="one", id="two", id="three", id="four", id="five", id="six", id="seven", id="eight", and id="nine".
Here is another hint if needed
The automated tests can’t “see” which numbers are printed on the buttons like you and I can (at least not these particular tests!). Instead, they use the ID of each button to know which one to click. Make sure the ID of each button accurately reflects the number value of the button.