Congcong’s room needs to be paved with tiles. If you use square bricks with an area of 0.09 square meters, you need 72 pieces; if you use square bricks with an area of 0.08 square meters, how many pieces are needed?
聪聪的房间要用瓷砖铺地，如果用面积是0.09平方米的方砖需要72块；如果改用面积是0.08平方米的方砖，需要多少块？
<gadget id="calculator">72 / 0.08</gadget>
<output>900</output>

<gadget id="calculator">0.09 * 900</gadget>
<output>81</output>

<result>81</result>