A semicircular chicken farm is surrounded by a fence of 18.84 meters against the wall. What is the area of the chicken farm in square meters?
用18.84米的篱笆靠墙围成了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">18.84 / 3.14</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">3.14 * 18</gadget>
<output>56.52</output>

<result>56.52</result>