A conical grain mound has a base circumference of 6.28 meters and a height of 0.9 meters. If each cubic meter of rice weighs 700 kilograms, how much does this pile of rice weigh in kilograms?
一个圆锥形谷堆的底面周长是6.28米，高是0.9米．如果每立方米稻谷重700千克，这堆稻谷重多少千克？
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">700 * (1/3) * 3.14 * 1 * 0.9</gadget>
<output>659.4</output>

<result>659.4</result>