How many liters equal 420 milliliters?
Remember K H D | d c m (kilo, hecto, deka, (liter, meter, gram),
deci, centi, milli). These are the denominations you need to list
when converting metric units. Liters are three places to the left
of milliliters. So you have to move the decimal place three times
to the left (same as dividing by 1000). You will get 420 mL = .420
L.