The circumference of the small circle is 3.14 decimeters, and the circumference of the large circle is twice the length of the small circle. What is the area of the large circle?
小圆周长为3.14分米，大圆周长是小圆周长的2倍，大圆面积是多少？
<gadget id="calculator">3.14 / 3.14 / 2</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 * 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>