Answer:
21,800 milliliters
Explanation:
Here's a trick.
King Henry Died By Drinking Chocolate Milk.
King = Kilo, Henry = Hecto, Died = Deka, By = Base (liters, grams, meters), Drinking = Deci, Chocolate = Centi, Milk = Milli.
This helps to remember the order so you can move the decimal over the proper amount of times.
If you are starting at the base, and need to move to milli, you will move the decimal place 3 places to the right.
So for 21.8 liters = 21,800 milliliters