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[miabellaa]

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[mateacademy-ai-mentor]

Review Summary

Here is my approval: your calculator meets all core requirements. The object initializes result to 0, includes all required methods (add, subtract, multiply, divide, reset, operate), and both operate and reset correctly return the calculator instance to support chaining. Arithmetic callbacks passed to operate behave as expected and update result correctly. As a minor improvement, you might consider handling edge cases like division by zero (e.g., returning Infinity, throwing an error, or guarding with a message), but this isn’t required for the task. Nice work keeping the API consistent and chainable—well done!

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