Description: Sal solves a US customary volume word problem involving pints and gallons. Created by Sal Khan and Monterey Institute for Technology and Education. A local hospital recently conducted a blood drive where they collected a total of 80 pints of blood from donors. The hospital was hoping to collect a total of 8 gallons of blood from the drive. You may or may not know how many pints there are per gallon, so let's just go straight to quarts first, and then from quarts we can go to gallons.*Teacher Advisor is 100% free.