Divide the circle into several equal sectors and form a rectangle. The circumference is 8 cm longer. How many centimeters is the circumference of the circle?
把圆平均分成若干相等的扇形，拼成一个长方形后，周长多了8cm，圆的周长为多少厘米？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

<result>25.12</result>