The floor area of a vegetable storage room is 40.5 square meters. How many square bricks are needed to pave the floor with a side length of 0.9 meters?
一个蔬菜储藏室地面的面积是40.5平方米，要作边长0.9米的正方形砖铺地，需要多少块这样的方砖？
<gadget id="calculator">0.9 * 0.9</gadget>
<output>0.81</output>

<gadget id="calculator">40.5 / 0.81</gadget>
<output>50</output>

<result>50</result>