A rectangular garden is 7 meters long and 4 meters wide. How much fencing is needed to surround it, with no gap?
A little nudge?
There are two long sides and two short sides.
Ready for the answer?
22 meters.
The perimeter is 7 + 4 + 7 + 4 = 22 meters. Multiplying 7 by 4 would give the area, not the length around the edge.