A cylindrical grain hoard filled with corn has a bottom circumference of 6.28 meters and a height of 2 meters. If these corns are piled into a cone-shaped corn pile with a height of 1 meter, what is the area of the bottom of the cone in square meters?
一个装满玉米的圆柱形粮囤，底面周长6.28米，高2米．如果将这些玉米堆成一个高1米的圆锥形的玉米堆，圆锥底面积是多少平方米？
<gadget id="calculator">6.28 / 2 / 3.14</gadget>
<output>1</output>

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

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

<gadget id="calculator">3.14 * 1 * 2 * 3</gadget>
<output>18.84</output>

<result>18.84</result>