The length of a circle of a circular pool is 62.8 meters, how many square meters does this pool occupy?
一个圆形水池一周的长度是62.8米，这个水池占地多少平方米？
<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<result>314</result>