A conical pile of wheat has a base radius of 3 meters and a height of 1.2 meters. Each cubic meter of wheat weighs about 800 kilograms. How many kilograms does this pile of wheat weigh?
一个圆锥形小麦堆，底面半径是3米，高1.2米，每立方米小麦约重800千克，这堆小麦约重多少千克？
<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 * 800</gadget>
<output>9_043.2</output>

<result>9_043.2</result>