What substance are you talking about? You need that first before you can move on.
Once the substance is known you can then look up the substance’s density in g/mL.
Now that you know the density you take the amount in mL given (38,220.92318) and multiply by the density you just looked up, you will be left with an answer in just grams. The mL will be ‘on top’ to start with, then you multiply by the density which has them on bottom, the mL will cross cancel each other leaving just grams.
Example using water:
Density of water = 1.0 g/mL (can also be written as 1.0 g per 1.0 mL)
38,220.92318 mL x 1.0 g = 38,220.92318 g
Example using methanol
Density of methanol = 0.79 g/mL (can also be written as 0.79 g per 1.0 mL)
38,220.92318 mL x 0.79 g = 30,194.5293 g