If the height of a cone remains the same, if the radius of its base is tripled, its volume will be multiplied to its original size.
一个圆锥的高不变，如果它的底面半径扩大到原来的3倍，那么他的体积就扩大到原来的多少倍．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<result>9</result>