Question: Compute $17\times 23$ and $13\times 13$. Just the numbers.

1. We are asked to compute the products $17\times 23$ and $13\times 13$. 2. Recall the multiplication operation: multiplying two numbers means adding one number to itself as many times as the other number indicates. 3. Calculate $17\times 23$: $$17 \times 23 = 17 \times (20 + 3) = 17 \times 20 + 17 \times 3 = 340 + 51 = 391$$ 4. Calculate $13\times 13$: $$13 \times 13 = 169$$ 5. Final answers: - $17\times 23 = 391$ - $13\times 13 = 169$