The spray radius of the automatic rotary sprinkler irrigation device is 10 meters, how many square meters is its maximum sprinkler irrigation area?
自动旋转喷灌装置的喷水半径是10米，它的最大喷灌面积是多少平方米？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

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

<result>314</result>