High and junior high school students in a certain middle school actively participated in the "I plant a tree for Xiaoping's hometown" activity. High school students planted 1,200 trees, 60 more than three times the number of junior high school students. How many trees were planted by senior and junior high school students in a middle school?
某中学高、初中学生积极参加"我为小平故里植棵树"活动．高中学生植树1200棵，是初中学生植树棵数的3倍还多60棵．某中学高、初中学生共植树多少棵？
<gadget id="calculator">1_200 - 60</gadget>
<output>1_140</output>

<gadget id="calculator">1_140 / 3</gadget>
<output>380</output>

<gadget id="calculator">1_200 + 380</gadget>
<output>1_580</output>

<result>1_580</result>