A conical sand pile with a bottom circumference of 18.84 meters and a height of 7.5 meters. How many cubic meters is this pile of sand?
一个圆锥形沙堆，底面周长为18.84米，高7.5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 * 7.5</gadget>
<output>70.65</output>

<result>70.65</result>