A conical grain mound with a base diameter of 10 meters and a height of 1.5 meters. If each cubic meter of rice weighs about 800 kilograms, how many kilograms does this pile of rice weigh?
一个圆锥形谷堆，底面直径10米，高1.5米．如果每立方米稻谷约重800千克，这堆稻谷约重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 1.5</gadget>
<output>39.25</output>

<gadget id="calculator">39.25 * 800</gadget>
<output>31_400</output>

<result>31_400</result>