How many liters of wine can be held in a wine barrel whose capacity is 28.0 gal? 1 gal = 4 qt = 3.7854 l?

This is the concept of conversions;

given that:

1 gal=4 qt=3.7854 l

then:

28 gal will be equivalent to the following number of liters;

28/1*3.7854

=105.9912 l

thus the number of liters of wine that can be held in a wine barrel is 105.99 l