Near the school there is a roughly conical rubble pile with a circumference of 18.84 meters. The height is 0.9 meters. If there are 2 tons of crushed stone per cubic meter, how many tons does this pile of crushed stone weigh?
学校附近有一个近似圆锥形的碎石堆，底面周长是18.84米．高是0.9米．如果每立方米碎石中2吨，这堆碎石堆大约重多少吨？
<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 * 0.9 * 2</gadget>
<output>16.956</output>

<result>16.956</result>