A forest farm sprays trees with sprayers, and 4 sprayers spray 600 trees in 5 hours. According to this calculation, how many trees can be sprayed by one sprayer per hour?
一个林场用喷雾器给树木喷药，4台喷雾器5小时喷了600棵，照这样计算，一台喷雾器每小时可以喷多少棵树木？
<gadget id="calculator">600 / 5 / 4</gadget>
<output>30</output>

<result>30</result>