There is an automatic rotary sprinkler irrigation device in the middle of the lawn in the park, and its range is 14 meters. What is the maximum area it can irrigate in square meters?
公园的草坪中间有一种自动旋转喷灌装置，它的射程是14米．它能喷灌的面积最大是多少平方米？
<gadget id="calculator">14 ** 2</gadget>
<output>196</output>

<gadget id="calculator">3.14 * 196</gadget>
<output>615.44</output>

<result>615.44</result>