The radius of the bottom of the cylinder is enlarged by 4 times, the height is reduced by 4 times, and the volume is enlarged by how many times
圆柱底面半径扩大4倍，高缩小4倍，体积扩大多少倍
<gadget id="calculator">4 / 4</gadget>
<output>1</output>

<gadget id="calculator">4 * 1</gadget>
<output>4</output>

<result>4</result>