conical wheat pile has a base radius of 2 meters and a height of 3 meters. Each cubic meter of wheat weighs about 200 kilograms. How many kilograms does this pile of wheat weigh?
一个圆锥形麦堆，底面半径是2米，高是3米，每立方米小麦约重200千克，这堆小麦大约有多少千克？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 4 * 3 * (1/3) * 200</gadget>
<output>2_512</output>

<result>2_512</result>