The radius of the cylinder is expanded to 3 times of the original, and the height is reduced to 1/3 of the original, how many times its volume is expanded to the original
圆柱半径扩大到原来的3倍，高缩为原来的(1/3)，它的体积扩大到原来的多少倍
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<result>3</result>