Title: The house should be paved with square bricks. It needs 96 square bricks with an area of 9 square decimeters. If you change it into a square brick with an area of 4 square decimeters, how many pieces do you need?
Solution: If you replace it with a square brick with an area of 4 square decimeters, you need X pieces.
4x=9×96
4x=864
x = 864 \4
x=2 16
Answer: It takes 2 16 bricks to replace them with square bricks with an area of 4 square decimeters.