1. Let's solve the multiplication problem: $280 \times 45$. 2. We can multiply step by step: $$280 \times 45 = 280 \times (40 + 5) = 280 \times 40 + 280 \times 5$$ 3. Calculate each part: $$280 \times 40 = 11200$$ $$280 \times 5 = 1400$$ 4. Add these results to get the final product: $$11200 + 1400 = 12600$$ Therefore, the product of $280$ and $45$ is $12600$.