Simplify the following using brackets.
`305 xx 40`

Answer

To simplify the expression \( 305 \times 40 \) using brackets, we can break down the number 305 into two parts: 300 and 5. Here’s how to do it step by step:

### Step-by-Step Solution:

1. **Rewrite the Expression**:
We can express 305 as the sum of 300 and 5. Thus, we can rewrite the expression as:
\[ 305 \times 40 = (300 + 5) \times 40 \]

2. **Apply the Distributive Property**:
Now, we will use the distributive property to expand the expression:
\[ (300 + 5) \times 40 = 300 \times 40 + 5 \times 40 \]

3. **Calculate Each Part**:
- First, calculate \( 300 \times 40 \):
\[ 300 \times 40 = 12000 \]
- Next, calculate \( 5 \times 40 \):
\[ 5 \times 40 = 200 \]

4. **Add the Results**:
Now, we add the two results together:
\[ 12000 + 200 = 12200 \]

5. **Final Answer**:
Therefore, the simplified result of \( 305 \times 40 \) is:
\[ \boxed{12200} \]