A room in Fangfang's house is 4.5 meters long and 4 meters wide. How many square bricks with an area of 0.25 square meters are needed to pave the floor?
芳芳家一个房间长4.5米，宽4米．用面积0.25平方米的方砖铺地，需要多少块？
<gadget id="calculator">4 / 0.25</gadget>
<output>16</output>

<gadget id="calculator">4.5 * 16</gadget>
<output>72</output>

<result>72</result>