An automatic sprinkler irrigation machine, its maximum spray distance is 15 meters, how many square meters is its sprinkler irrigation area?
一种自动喷灌机，它的最大喷程是15米，它的喷灌面积是多少平方米？
<gadget id="calculator">15 ** 2</gadget>
<output>225</output>

<gadget id="calculator">3.14 * 225</gadget>
<output>706.5</output>

<result>706.5</result>