Round each number to estimate the product, then find which is closest to 800.<br><br>
&bull; 23 × 4 → 20 × 4 = 80<br>
&bull; 4 × 281 → 4 × 300 = 1200<br>
&bull; 11 × 74 → 10 × 70 = 700<br>
&bull; 418 × 2 → 400 × 2 = 800<br><br>
418 × 2 is estimated to be 800.<br><br>
Final Answer: 418 × 2