A conical sand pile has a base circumference of 15.7 meters and a height of 0.6 meters. What is the volume of this cone of sand in cubic meters?
一个圆锥形沙堆的底面周长是15.7米，高是0.6米．这个圆锥沙堆的体积是多少立方米？
<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 * 0.6</gadget>
<output>3.925</output>

<result>3.925</result>