A pile of coal is conical, 2 meters high and 18.84 meters in circumference at the bottom. What is the approximate volume?
一堆煤成圆锥形，高2米，底面周长18.84米，体积大约多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">(1/3) * 3.14 * 9 * 2</gadget>
<output>18.84</output>

<result>18.84</result>