the distance around a closed, two-dimensional figure

l x w

filling up a pool

building a sidewalk around the edges of a pool

2( l + w )

framing a picture

painting a wall

packing a rectangular prism-shaped box

covering a football field with turf(grass)

l x w x h

multiplying side times side

building a fence around a rectangular garden

laying new carpet on the floor in a rectangular shaped room

l + w + l + w

filling a fish tank with water

adding lace to all the sides of a rectangular shaped table cloth

filling a flower box with potting soil

packing a suitcase

cubic units

Adding the side lengths

the number of square units needed to cover a surface with no gaps or overlaps

covering the kitchen floor with tile

the number of cubic units needed to fill the space occupied by a solid