There is a conical pile of sand and gravel, the circumference of the bottom surface is 12.56 meters, and the height is 0.6 meters. If each cubic meter of sand and gravel weighs 1.8 tons, how many tons does this pile of sand and gravel weigh?
有一个圆锥状的沙石堆，底面周长是12.56米，高是0.6米，如果每立方米沙石重1.8吨，这堆沙石重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">(1/3) * 3.14 * 4 * 0.6</gadget>
<output>2.512</output>

<gadget id="calculator">2.512 * 1.8</gadget>
<output>4.5216</output>

<result>4.5216</result>