If the radius and height of the base of a cone are tripled, its volume will be multiplied to its original size.
一个圆锥体的底面半径和高都扩大3倍，它的体积就扩大到原来的多少倍．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>