Multiply 148 by 3.

Brief Explanation:

Step-by-step Solution:

1. Step 1: Multiply the ones digit (8) by 3: $$8 \times 3 = 24$$. Write down 4 and carry over 2.
2. Step 2: Multiply the tens digit (4) by 3: $$4 \times 3 = 12$$. Add the carried-over 2: $$12 + 2 = 14$$. Write down 4 and carry over 1.
3. Step 3: Multiply the hundreds digit (1) by 3: $$1 \times 3 = 3$$. Add the carried-over 1: $$3 + 1 = 4$$. Write down 4.

Answer: 444