1. The problem is to multiply the numbers 1, 8, and 18 vertically. 2. Vertical multiplication means multiplying the numbers one by one, starting from the top. 3. First, multiply 1 by 8: $$1 \times 8 = 8$$ 4. Next, multiply the result by 18: $$8 \times 18 = 144$$ 5. So, the final answer is: $$144$$