Multiply 253 by 3.

Brief Explanation:

Step-by-step Solution:

1. Step 1: Multiply the ones digit (3) by 3: $$3 \times 3 = 9$$. Write down 9.
2. Step 2: Multiply the tens digit (5) by 3: $$5 \times 3 = 15$$. Write down 5 and carry over 1.
3. Step 3: Multiply the hundreds digit (2) by 3: $$2 \times 3 = 6$$. Add the carried-over 1: $$6 + 1 = 7$$. Write down 7.

Answer: 759