I think it means you have to find the area of both shapes and then compare them to see if Liam is correct if he is not correct say why. Hope this helps :)
The volume for 3 boxes of detergent is 864 inches
Volume= length X width X hight
V=12X8X3
V=288
V=864 (288 times 3 for 3 boxes)
-9 is farther from 0 on the number line.