circle with an area of 50.24 square centimeters can be enclosed by a piece of rope, find the length of this piece of rope.
用一段绳子可以围成面积为50.24平方厘米的圆，求这段绳子的长度．
<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

<result>25.12</result>