The furthest spraying distance of an automatic rotating sprinkler is about 6 meters. How much is the area that will be irrigated after it rotates once?
一个自动旋转喷水器的最远喷水距离大约是6米．它旋转一周后喷灌的面积约有多少？
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<result>113.04</result>