A conical sand pile has a bottom circumference of 25.12 meters and a height of 3 meters. 1 cubic meter of sand weighs 1.45 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3米.1立方米沙重1.45吨．这堆沙重多少吨？
<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 * 3 * 1.45</gadget>
<output>72.848</output>

<result>72.848</result>