There is an automatic rotary sprinkler irrigation device on the grass in Xixia Park with a range of 15 meters. How much area can it irrigate?
西夏公园草地上有一个自动旋转喷灌装置的射程是15米，它能喷灌的面积是多少？
<gadget id="calculator">15 ** 2</gadget>
<output>225</output>

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

<result>706.5</result>