A conical pile of wheat has a base radius of 3 meters and a height of 1.2 meters. If each cubic meter of wheat weighs 750 kilograms, how many kilograms does this pile of wheat weigh?
一个圆锥形麦堆，底面半径3米，高1.2米，如果每立方米小麦重750千克，这堆小麦重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 1.2</gadget>
<output>11.304</output>

<gadget id="calculator">11.304 * 750</gadget>
<output>8_478</output>

<result>8_478</result>