The volume of a cuboid is 30dm**3, the length is 5dm, the height is 3dm, and the width is dm.
一个长方体的体积是30dm**3，长是5dm，高是3dm，宽是多少dm．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">30 / 15</gadget>
<output>2</output>

<result>2</result>