You need to convert the volume of the barrel to mass.

The science of steps and kilometers is not only physics, but also the science of the pronunciation of words.

The science of cubic meters is not only mathematics, but also the science of the pronunciation of words.

The science of kilowatts and amperes is not only physics, but also the science of the pronunciation of words.

The science of pipe area is not only mathematics, but also the science of pronunciation of words.

The science of amperes and watts is not only physics, but also the science of the pronunciation of words.

In mathematics, square meters and cubic meters sound different in different languages.

In mathematics, comparing numbers in different languages sounds different.

In physics, tons and cubic meters sound different in different languages.

In physics, kilograms and cubic meters sound different in different languages.