I love to show that kind of shit to AI boosters. (In case you're wondering, the numbers were chosen randomly and the answer is incorrect).
They go waaa waaa its not a calculator, and then I can point out that it got the leading 6 digits and the last digit correct, which is a lot better than it did on the "softer" parts of the test.
Note that the train of thought thing originated from users as a prompt "hack": you'd ask the bot to "go through the task step by step, checking your work and explaining what you are doing along the way" to supposedly get better results. There's no more to it than pure LLM vomit.
(I believe it does have the potential to help somewhat, in that it's more or less equivalent to running the query several times and averaging the results, so you get an answer that's more in line with the normal distribution. Certainly nothing to do with thought.)