If the density of the fuel is 0.821 g/ml, what mass of fuel has the airplane taken on?

Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. To calculate the mass of the fuel, we use the density given and we need the volume that was used by the airplane. From other sources, I guess the lacking information would be that this airplane takes on 245 liters of fuel. Now, we calculate for the mass of the fuel by multiplying the volume with the density.

Mass of fuel = 0.821 g / mL (245 L) (1000 mL / 1 L) = 201145 g