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Xiaogang's bedroom floor is 4 meters long and 3.5 meters wide. It is paved with 0.25 square meters square bricks. How many square bricks do you need?
4 × 3.5 △ 0.25, = 14 △ 0.25, = 56 (pieces); answer: 56 square bricks are needed
A room with an area of 0.36 square meters of square brick floor, shared 250 pieces, if you use the side length of 0.5 meters of square brick floor to use how many pieces?
0.36×250÷（0.5×0.5）
=360
Answer: if use the square brick with side length of 0.5 meters to pave the floor, 360 pieces should be used
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