I find the mistakes that it makes really interesting. They often feel rather human - e.g. if you were to ask me to multiply two large numbers together under time pressure it's likely I could get the number of digits and first few digits right, but make mistakes in the other digits (or just guess).
I'll also answer: No, it cannot.
Now that that's out of the way, we can get to discussing more interesting topics, like why an advanced language model is so bad at basic arithmetic.