What is the area occupied by a cuboid with a length of 1m, a width of 0.8m, and a height of 0.5m?
一个长1m，宽0.8m，高0.5m的长方体，它的占地面积是多少．
<gadget id="calculator">1 * 0.8</gadget>
<output>0.8</output>

<result>0.8</result>