Yue Yue's family has a study room that is 4.5 meters long and 4 meters wide. The floor is paved with square bricks with an area of 0.5 square meters. How many bricks are needed at least?
岳岳家有一个书房长4.5米，宽4米，用面积是0.5平方米的方砖铺底，至少需要多少块？
<gadget id="calculator">4.5 / 0.5</gadget>
<output>9</output>

<gadget id="calculator">4 * 9</gadget>
<output>36</output>

<result>36</result>