Given that the circumference of a circle is 6.28, what is the area of the circle (π=3.14)
已知一个圆的周长为6.28，则这个圆的面积是多少(π=3.14)
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

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

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

<result>3.14</result>