The panda house in the zoo is circular, and its circumference is 314 meters. How many square meters does the panda house cover?
动物园里的熊猫馆是圆形的，它的周长是314米，熊猫馆的占地面积是多少平方米？
<gadget id="calculator">314 / 3.14 / 2</gadget>
<output>50</output>

<gadget id="calculator">50 ** 2</gadget>
<output>2_500</output>

<gadget id="calculator">3.14 * 2_500</gadget>
<output>7_850</output>

<result>7_850</result>