The factory has a large conical funnel with an inner diameter of 2 meters and a height of 1.5 meters. If each cubic meter of grain weighs 680 kilograms, how many kilograms does this funnel weigh?
工厂有一个大型圆锥形漏斗，内直径为2米，高1.5米．如果每立方米粮食重680千克，那么这一漏斗粮食重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">(1/3) * 3.14 * 1 * 1.5 * 680</gadget>
<output>1_067.6</output>

<result>1_067.6</result>