A conical sand pile, the circumference of the bottom is 25.12 meters, the height is 1.2 meters, 20 yuan per cubic meter of sand. How much does it cost to buy this pile of sand?
一个圆锥形沙堆，底面周长是25.12米，高是1.2米，每立方米沙20元．买这堆沙需付多少钱？
<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 * 1.2 * 20</gadget>
<output>401.92</output>

<result>401.92</result>