I dunno, that seemed pretty impressive to me. Might not have given the right answer but given the fairly esoteric question, and then the follow-up which is completely devoid of punctuation and difficult for even a native English speaker to read, it could have been worse.
Also worth bearing in mind that none of these AI tools are designed, as yet, to cope with mathematical operations. It’s not part of the training and getting a spontaneous answer that’s correct is emergent behaviour.