impossible to convert a length meaure (kilometers) to a volume measure (milliliters)
However, If you mean Millimeters then there are 4,200,000 mm in 4.2 km
56 kilometers=56,000,000 millimeters
42 acres is equivalent to 0.169967 square kilometers
3.1km = 3,100,000mm
420 mL = .42 L
42 miles=67.592448 kilometers
42 kilometers = 26.0975901 miles
42 kilometers = 26.0975901 miles
42
42 kilometers are 26.09759 miles.
There are 10 millilitres in one centilitre. Therefore, 42 centilitres is equal to 42 x 10 = 420 millilitres.
NONE -you cannot compare a LENGTH to a VOLUME
42 miles is 67.6km