Errors are not failures — they're Python telling you exactly what it couldn't do. Learning to read them is a core skill.

Run that. You'll get a NameError saying numbet is not defined. Python even points to the line. The fix is obvious once you read it: correct the spelling to number.

The pattern for every error: read the last line first (it names the problem), then look at the line number. Most errors are typos, wrong names, or missing punctuation.