If the two legs of the compass are separated and the distance between the two legs is 2 cm, what is the circumference of the circle drawn? (π=3.14)
若圆规的两脚分开后，两脚间的距离为2cm，那么所画出的圆的周长为多少cm．(π=3.14)
<gadget id="calculator">3.14 * 2 * 2</gadget>
<output>12.56</output>

<result>12.56</result>