An approximately conical yellow sand pile with a bottom circumference of 18.84 meters and a height of 0.5 meters. If each cubic meter of yellow sand weighs about 2 tons, how many tons does this pile of yellow sand weigh?
一个近似于圆锥形的黄砂堆，底面周长18.84米，高0.5米．如果每立方米黄砂约重2吨，这堆黄砂大约重多少吨？
<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 * 0.5 * 2</gadget>
<output>9.42</output>

<result>9.42</result>