A total of 2,100 poplar trees were planted beside a 14-kilometer-long embankment. How many poplar trees were planted per kilometer on average?
一条14千米长的河堤旁共栽了2100棵杨树，平均每千米栽多少棵杨树？
<gadget id="calculator">2_100 / 14</gadget>
<output>150</output>

<result>150</result>