A cylinder whose height is 10cm and whose base diameter is 6cm, what is its volume?
一个圆柱高是10cm，底面直径是6cm，它的体积是多少．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">9 * 3.14 * 10</gadget>
<output>282.6</output>

<result>282.6</result>