There is a conical pile of sand on the construction site. The circumference of the bottom is 25.12 meters and the height is 1.5 meters. If the sand weighs 1.6 tons per cubic meter, how many tons does the pile of sand weigh?
建筑工地有一个近似圆锥形的沙堆，底面周长是25.12米，高是1.5米，如果每立方米沙重1.6吨，这堆沙大约重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

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

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">(1/3) * 50.24 * 1.5 * 1.6</gadget>
<output>40.192</output>

<result>40.192</result>