conical wheat pile has a diameter of 2m at the bottom and a height of 1.8m. Each cubic meter of wheat weighs about 700kg. If the flour extraction rate is 80%, how many kilograms of flour can be produced from this pile of wheat?
一个圆锥麦堆，底面直径是2m，高1.8m，每立方米小麦约重700千克，按出粉率80%计算，这堆小麦可磨出面粉多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 3.14 * 1 * 1.8</gadget>
<output>1.884</output>

<gadget id="calculator">700 * 1.884</gadget>
<output>1_318.8</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1_318.8 * (4/5)</gadget>
<output>1_055.04</output>

<result>1_055.04</result>