The circumference of a semicircle is 41.12 cm, what is the area of the semicircle in square centimeters?
一个半圆的周长是41.12厘米，这个半圆的面积是多少平方厘米？
<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">64 / 2</gadget>
<output>32</output>

<gadget id="calculator">3.14 * 32</gadget>
<output>100.48</output>

<result>100.48</result>