If the height of a cylinder is 10 decimeters and the diameter of the base is 6 decimeters, what is its volume?
一个圆柱的高是10分米，底面直径是6分米，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">3.14 * 9 * 10</gadget>
<output>282.6</output>

<result>282.6</result>