Milliliters and milligrams measure different quantities (volume and mass, respectively)
Unless you are given a density, you can't convert between them.
How many nano grams equal a milligram
289,000,000. 1 killiter = 1,000,000 milliters
32mm
32mm
15
That is 2.4teaspoons
962000
750
0.02
7,800 ml
That is 250 ml.
350