A cone-shaped rice pile has a base diameter of 4 meters and a height of 1.5 meters. It is known that the weight of rice per cubic meter is 750 kilograms. How many kilograms does this pile of rice weigh in total?
一个圆锥形的稻谷堆，量得它的底面直径为4米，高为1.5米，已知每立方米稻谷重750千克，这堆稻谷共重多少千克？
<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 * 750</gadget>
<output>4_710</output>

<result>4_710</result>