A cylinder whose base radius is 2 decimeters and whose height is 1.8 decimeters, what is its volume?
一个圆柱的底面半径是2分米，高是1.8分米，它的体积是多少？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 1.8</gadget>
<output>22.608</output>

<result>22.608</result>