Evaluate:
`5.81 xx 9`

Answer

To evaluate the expression \(5.81 \times 9\), we will follow these steps:

### Step 1: Multiply the whole number part
First, we multiply \(9\) by the digits of \(5.81\) without considering the decimal point initially.

1. **Multiply \(9\) by \(1\)** (the last digit):
\[ 9 \times 1 = 9 \]

2. **Multiply \(9\) by \(8\)** (the second digit):
\[ 9 \times 8 = 72 \]
Write down \(2\) and carry over \(7\).

3. **Multiply \(9\) by \(5\)** (the first digit):
\[ 9 \times 5 = 45 \]
Now add the carry over \(7\):
\[ 45 + 7 = 52 \]

### Step 2: Combine the results
Now we combine the results of our multiplication:
- From the last multiplication, we have \(52\) and from the previous steps, we have \(2\) and \(9\).

So, we write it as:
\[ \text{Result} = 52 \text{ (from } 5 \text{ and } 9) \text{ followed by } 2 \text{ (from } 8 \text{ and } 9) \text{ followed by } 9 \text{ (from } 1 \text{ and } 9). \]

### Step 3: Place the decimal point
Now we need to place the decimal point in the result. The original number \(5.81\) has two decimal places. Therefore, we need to place the decimal point in our result \(52.29\) after two digits from the right:
\[ 52.29 \]

### Final Answer
Thus, the final answer is:
\[ \boxed{52.29} \]

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