600 peach trees are planted in the orchard, 10 in each row. 4 fruit growers are going to spray pesticides, how many rows do they need to spray on average?
果园里栽了600棵桃树，每行10棵．4位果农去喷洒农药，平均每人要喷洒多少行？
<gadget id="calculator">600 / 10 / 4</gadget>
<output>15</output>

<result>15</result>