The rice harvested by Xiao Ming's family last autumn has become a conical grain pile with a bottom diameter of 4m and a height of 1.5m. If each cubic meter of rice weighs 650 kilograms, how many kilograms does this pile of rice weigh?
小明家去年秋季收获的稻谷堆成了一个底面直径4m，高1.5m的圆锥形谷堆．如果每立方米稻谷重650千克，这堆稻谷重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">(1/3) * 3.14 * 4 * 1.5 * 650</gadget>
<output>4_082</output>

<result>4_082</result>