A conical pile of sand is 3 meters high, with a base radius of 4 meters and weighs 1.7 tons per cubic meter of sand. How many tons does this pile of sand weigh?
一个圆锥形沙堆，高是3米，底面半径是4米，每立方米沙重1.7吨．这堆沙重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 3 * 1.7</gadget>
<output>85.408</output>

<result>85.408</result>