If the radius of a cone is tripled and its height doubled, how many times will its volume be enlarged?
把一个圆锥的半径扩大3倍，高扩大2倍，则它的体积扩大多少倍．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<result>18</result>