An automatic rotary sprinkler irrigation device for wheat fields has a range of 15 meters. How many square meters can it irrigate?
一种麦田的自动旋转喷灌装置的射程15米．它能喷灌的面积有多少平方米？
<gadget id="calculator">3.14 * 15 * 15</gadget>
<output>706.5</output>

<result>706.5</result>