The circumference of the bottom of a conical sand pile is 18.84 meters and the height is 5 meters. What is its volume?
一个圆锥形沙堆的底面周长是18.84米，高是5米，它的体积是多少．
<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 * 5</gadget>
<output>47.1</output>

<result>47.1</result>