On one side of a 24-kilometer-long road, a total of 4,300 poplar trees and 3,020 willow trees were planted. How many trees are planted per kilometer on average?
在一条长24千米的公路的一边，一共栽了4300棵杨树，3020棵柳树．平均每千米栽了多少棵树？
<gadget id="calculator">4_300 + 3_020</gadget>
<output>7_320</output>

<gadget id="calculator">7_320 / 24</gadget>
<output>305</output>

<result>305</result>