The circumference of a cone-shaped sand pile is 12.56 meters and the height is 3 meters. What is the volume of this cone-shaped sand pile?
一个圆锥形沙堆底面周长是12.56米，高是3米，这个圆锥形沙堆的体积是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 3</gadget>
<output>12.56</output>

<result>12.56</result>