There is a cone-shaped pile of sand on the construction site. The circumference of the bottom surface is 18.84 meters and the height is 2.5 meters. How many cubic meters is the pile of sand?
建筑工地上有一堆圆锥形的沙子，量得它的底面周长是18.84米，高2.5米，这堆沙子有多少立方米？
<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 * 2.5</gadget>
<output>23.55</output>

<result>23.55</result>