Under the condition that the volume of a cone remains constant, if the radius of its base is doubled, how many times should its height be reduced?
一个圆锥在体积不变的条件下，若它的底面半径扩大2倍，它的高应缩小多少倍
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>