Educational worksheet teaching how to convert between liters and milliliters using visual examples.

To find out how many milliliters are in 23 liters, we need to use the conversion rule shown in the worksheet.

Step 1: Identify the rule
The text on the left side of the page says: "To convert liters to milliliters, multiply by 1,000."

Step 2: Set up the calculation
We have 23 liters. According to the rule, we need to multiply this number by 1,000.
$$23 \times 1,000 = ?$$

Step 3: Solve
When you multiply a whole number by 1,000, you simply add three zeros to the end of that number.
$$23 \rightarrow 23,000$$

So, there are 23,000 milliliters in 23 liters.

Final Answer:
23,000