If the radius of the base of a cone is doubled and the height is tripled, how many times will its volume be doubled?
一个圆锥底面半径扩大2倍，高扩大3倍，它的体积扩大多少倍
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>