A semicircular flower bed has an area of 56.52 square meters, what is the perimeter of the flower bed?
一个半圆形的花坛，它的面积是56.52平方米，求这个花坛的周长是多少？
<gadget id="calculator">3.14 * 6</gadget>
<output>18.84</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">18.84 + 12</gadget>
<output>30.84</output>

<result>30.84</result>