This hasn't been true for a while now. I asked Gemini 3 Thinking to compute the multiplication "by hand." It showed its work and checked its answer by casting

This hasn't been true for a while now. I asked Gemini 3 Thinking to compute the multiplication "by hand." It showed its work and checked its answer by casting out nines and then by asking Python. Sonnet 4.6 with Extended Thinking on also computed it correctly with the same prompt.