A fence is surrounded by a circular flower bed, and a fence of 43.96 meters is required. What is the area of this flower bed?
在一个圆形花坛四周围一圈篱笆，需要43.96米篱笆，这个花坛的面积是多少？
<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">43.96 / 6.28</gadget>
<output>7</output>

<gadget id="calculator">7 ** 2</gadget>
<output>49</output>

<gadget id="calculator">3.14 * 49</gadget>
<output>153.86</output>

<result>153.86</result>