A cylinder has a base diameter and a height of 6 decimeters. Find the volume of this cylinder.
一个圆柱体，底面直径和高都是6分米．求这个圆柱体的体积．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 6</gadget>
<output>169.56</output>

<result>169.56</result>