The distance between the legs of the compass is 2 cm. If the circle is evenly divided into several parts, and cut together to form an approximate rectangle, what is the length of the approximate rectangle in centimeters?
圆规两脚间的距离为2厘米．如果将这个圆平均分成若干份后，剪拼成一个近似的长方形，这个近似长方形的长是多少厘米．
<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<result>6.28</result>