Divide a circle with an area of 12.56cm**2 into several equal parts and form an approximate rectangle. What is the length of this rectangle (take 3.14 for π).
将一个面积为12.56cm**2的圆等分成若干份，拼成一个近似的长方形，这个长方形的长是多少(π取3.14)．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">2 * 3.14 * 1</gadget>
<output>6.28</output>

<result>6.28</result>