There is a conical wheat pile on the threshing floor, the circumference of the bottom is 15.7 meters, and the height is 1.2 meters. One cubic meter of wheat weighs about 740 kilograms. How many kilograms does this pile of wheat weigh?
打谷场上有一个圆锥形小麦堆，底面周长是15.7米，高是1.2米．每立方米小麦约重740千克，这堆小麦有多少千克？
<gadget id="calculator">15.7 / 3.14 / 2</gadget>
<output>2.5</output>

<gadget id="calculator">2.5 ** 2</gadget>
<output>6.25</output>

<gadget id="calculator">1.2 / 3</gadget>
<output>0.4</output>

<gadget id="calculator">3.14 * 6.25 * 0.4</gadget>
<output>7.85</output>

<gadget id="calculator">7.85 * 740</gadget>
<output>5_809</output>

<result>5_809</result>