conical sand pile, the circumference of the bottom is 25.12 meters, and the height is 1.8 meters. If each cubic meter of sand weighs 1.7 tons, how many tons does this pile of sand weigh?
一个圆锥形沙堆，底面周长是25.12米，高1.8米．如果每立方米沙重1.7吨，这堆沙子重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">25.12 / 6.28</gadget>
<output>4</output>

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

<gadget id="calculator">(1/3) * 3.14 * 16 * 1.8 * 1.7</gadget>
<output>51.2448</output>

<result>51.2448</result>