A cone-shaped pile of sand has a base diameter of 6 meters and a height of 1.8 meters. What is its volume?
一圆锥形的沙堆，底面直径是6米，高1.8米，它的体积是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">(1/3) * 3.14 * 9 * 1.8</gadget>
<output>16.956</output>

<result>16.956</result>