To be more accurate, the 7 year old will tell you they can't do it and suggest the use of a calculator. GPT simply gives you a complete hallucination. This can

To be more accurate, the 7 year old will tell you they can't do it and suggest the use of a calculator. GPT simply gives you a complete hallucination. This can be gotten around imperfectly with prompt engineering to get GPT to admit it doesn't know. But still, hallucinations are pretty dangerous failure modes in many applications, and definitely something we don't want in a future iteration. I don't know how much of a change it is to create a GPT without hallucinations, but I suspect that it is non-trival.