Mom built a semicircular chicken coop with a diameter of 12 meters near the wall. What is the floor area of this chicken coop?
妈妈在靠墙处围了一个直径是12米的半圆形鸡舍，这个鸡舍的占地面积是多少？
<gadget id="calculator">12 / 2</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>