A swimming pool with the largest area surrounded by 4 semicircles of the same size has a circumference of 125.6 meters. What is the area of the swimming pool in square meters?
一个由4个大小相同的半圆围成的一个面积最大的游泳池，周长是125.6米，这个游泳池的面积是多少平方米？
<gadget id="calculator">125.6 / 4</gadget>
<output>31.4</output>

<gadget id="calculator">31.4 / 3.14</gadget>
<output>10</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">20 ** 2</gadget>
<output>400</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 2</gadget>
<output>628</output>

<gadget id="calculator">400 + 628</gadget>
<output>1_028</output>

<result>1_028</result>