Answer
$4~kL=4000~dm^3=4,000,000~g$
Work Step by Step
$1~dm^3 = 1~L = 1~kg$
$1~kg = 1000~g$
$1~kL = 1000~L$
We can convert 4 kiloliters to units of cubic decimeters.
$4~kL = \frac{4~kL}{1}\times \frac{1000~L}{1~kL}\times \frac{1~dm^3}{1~L} = 4000~dm^3$
We can convert 4000 cubic decimeters to units of grams.
$4000~dm^3 = \frac{4000~dm^3}{1}\times \frac{1~kg}{1~dm^3}\times \frac{1000~g}{1~kg} = 4,000,000~g$