Because there are 6 1/2 in the door panel, and the rear deck.
It means the your eyes are 6 in width and 9 in height or vice versa.
The answer depends on the units used for the pavers' measurements. 6*9 sq feet, or sq inches or some other unit?
to remove or change rear speakers on 97 to 03 grand prix..where carpet meets the bottom of rear bench on each side there is tabs, pul tabs and lift out rear seat ,there are two bolts holding in the bottom of the seat back one on each side above the seat pots.Remove the seat back by sliding up then out towards front of car(don't force hard! slide up first then pull outward!)the rear deck has bolts holding it down now in plain sight. remove the bolts/screws and slide the seat belts out of the deck and remove upward and out. You will now see the speakers are screwed in from the top. ps. unplug the 3" or 31/4" whatever they they are crap!use good 6by9 capped for 80!