The farthest spraying distance of the automatic sprinkler irrigation device on the grass in People's Square is 8 meters, so what is its maximum sprinkler irrigation area π square meters
人民广场草地上的自动喷灌装置喷淋的最远距离为8米，那么，它的最大喷灌面积为多少π平方米
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>