Pile a pile of rice into a cone with a base diameter of 4 meters and a height of 1.2 meters. If each cubic meter of rice weighs 728 kilograms, how many kilograms does this pile of rice weigh?
把一堆稻谷堆成一个底面直径是4米，高1.2米的圆锥．如果每立方米稻谷重728千克，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 * 1.2</gadget>
<output>5.024</output>

<gadget id="calculator">5.024 * 728</gadget>
<output>3_657.472</output>

<result>3_657.472</result>