A conical pile of sand is 1.8 meters high, the radius of the bottom is 3 meters, and the sand weighs 1.7 tons per cubic meter. How many tons does this pile of sand weigh?
一个圆锥形沙堆，高是1.8米，底面半径是3米，每立方米沙重1.7吨，这堆沙约重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 1.8 * 1.7</gadget>
<output>28.8252</output>

<result>28.8252</result>