A cone has a base diameter of 20 cm and a height of 9 cm, what is its volume?
一个圆锥的底面直径是20厘米，高是9厘米，体积是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">(1/3) * 3.14 * 100 * 9</gadget>
<output>942</output>

<result>942</result>