An approximately conical wheat pile has a base circumference of 12.56 meters and a height of 1.5 meters. If each cubic meter of wheat weighs 0.75 tons, how many tons does this pile of wheat weigh?
一个近似圆锥形的小麦堆，底面周长12.56米，高1.5米，如果每立方米小麦重0.75吨，这堆小麦大约重多少吨？
<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">12.56 / 6.28</gadget>
<output>2</output>

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

<gadget id="calculator">(1/3) * 3.14 * 4 * 1.5</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 * 0.75</gadget>
<output>4.71</output>

<result>4.71</result>