A conical wheat pile has a base circumference of 62.8 decimeters and a height of 20 decimeters. If each cubic decimeter of wheat weighs 1.5 kg. How many kilograms do these wheats weigh?
一个圆锥形麦堆，底面周长是62.8分米，高20分米．如果每立方分米小麦重1.5千克．这些小麦重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">(1/3) * 3.14 * 100 * 20 * 1.5</gadget>
<output>3_140</output>

<result>3_140</result>