cuboid glass tank has a volume of 30 ml, a length of 5 cm, a height of 3 cm, and a width of cm.
一个长方体玻璃水箱的容积是30毫升，长是5厘米，高是3厘米，宽是多少厘米．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

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

<result>2</result>