If the area and height of the base of the cone are doubled, then the volume will be enlarged to the original, how many times.
圆锥体的底面积和高都扩大到原来的2倍，则体积扩大到原来的、多少倍．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>