A conical wheat pile has a base circumference of 12.56 meters and a height of 3 meters. Each cubic meter of wheat weighs 0.75 tons. How many tons does this pile of wheat weigh?
一个圆锥形麦堆，底面周长是12.56米，高3米．每立方米小麦重0.75吨，这堆小麦约重多少吨？
<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 * 3 * 0.75</gadget>
<output>9.42</output>

<result>9.42</result>