A conical wheat pile has a base radius of 2m and a height of 4.5m. The weight of each cubic meter of wheat is 750kg. How many kilograms does this conical wheat pile weigh?
一个圆锥形麦堆，底面半径是2m，高是4.5m，每立方米小麦重750kg，这个圆锥形麦堆重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 4.5</gadget>
<output>18.84</output>

<gadget id="calculator">18.84 * 750</gadget>
<output>14_130</output>

<result>14_130</result>