A conical wheat pile has a base circumference of 15.7 meters and a height of 1.8 meters. What is the volume of this wheat pile?
一个圆锥形麦堆，底面周长是15.7米，高是1.8米，这个麦堆的体积是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">15.7 / 3.14 / 2</gadget>
<output>2.5</output>

<gadget id="calculator">2.5 ** 2</gadget>
<output>6.25</output>

<gadget id="calculator">(1/3) * 3.14 * 6.25 * 1.8</gadget>
<output>11.775</output>

<result>11.775</result>