1. The problem is to find the product of 1 using vertical multiplication. 2. Vertical multiplication means multiplying numbers by writing one number above the other and multiplying digit by digit. 3. Since the number is 1, multiplying it by any number results in the same number. 4. Here, multiplying 1 by itself or any number is straightforward: $$1 \times 1 = 1$$. 5. Therefore, the answer is 1.