A square is surrounded by a rope, and a circle is formed by this rope. The radius of the circle is 2(π-2) meters less than the side length of the square. What is the length of the rope in centimeters?
用一根绳子围成一个正方形，又用这根绳子围成一个圆，结果圆的半径比正方形的边长少2(π-2)米，这根绳子的长是多少厘米．
<gadget id="calculator">3.14 * 8</gadget>
<output>25.12</output>

<result>25.12</result>