A conical rice pile with a bottom circumference of 12.56 meters and a height of 0.9 meters. If each cubic meter weighs 0.75 tons, how many tons does this pile of rice weigh?
一个圆锥形稻谷堆，底面周长12.56米，高0.9米．如果每立方米重0.75吨，这堆稻谷重多少吨？
<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 * 0.9 * 0.75</gadget>
<output>2.826</output>

<result>2.826</result>