First you need to know what

is in a decimal. It will equal

.
Then you need to know how many liters equal a millimeter.

liters equal a millimeter, or in other words

millimeters equals a liter.
Next you multiply, which you should know if that is

then you just fill the multiplication problem with

. As in this equation if you multiply

to

, you'll get

. So if you do

... it will change into

. If it was in a cubic way it would be

. So the answer is

, or

. But we're not finished until were done subtracting to get out answer.

liters equals

millimeters,

-

... which is

.