The volume of a cylinder is 36 cubic decimeters. If the height remains the same and the radius of the base is doubled, what is the volume of the cylinder?
一个圆柱体积是36立方分米，如果高不变，底面半径扩大2倍，这个圆柱体体积是多少立方分米．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">36 * 4</gadget>
<output>144</output>

<result>144</result>