A cuboid with a volume of 240 cubic meters and a length of 80 decimeters, what is the cross-sectional area?
一根体积是240立方米的长方体木料，长是80分米，横截面积是多少．
<gadget id="calculator">80 / 10</gadget>
<output>8</output>

<gadget id="calculator">240 / 8</gadget>
<output>30</output>

<result>30</result>