If the height of a cylinder remains the same and the radius of its base is tripled, its volume will be multiplied to its original volume.
一个圆柱体的高不变，它的底面半径扩大3倍，它的体积就扩大到原来的多少倍．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>