Uncle Li from Taizhou Landscaping Department sprayed 810 landscape trees with water from 9:00 am to 12:00 noon. How many trees does he spray on average per hour?
泰州园林绿化处的李大伯从早晨9时到中午12时，共给810棵景观树喷了药水，他平均每小时喷多少棵？
<gadget id="calculator">810 / 3</gadget>
<output>270</output>

<result>270</result>