The same piece of 37.68-meter-long fence surrounds a semicircular chicken farm against the wall. What is the area of the chicken farm in square meters?
同一块长37.68米的篱笆靠墙围城一个半圆形的养鸡场，这个养鸡场的面积是多少平方米？
<gadget id="calculator">37.68 / 3.14</gadget>
<output>12</output>

<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

<gadget id="calculator">144 / 2</gadget>
<output>72</output>

<gadget id="calculator">3.14 * 72</gadget>
<output>226.08</output>

<result>226.08</result>