Teacher Wang led a class of students to plant trees. The students were just divided into four groups on average and each person planted the same number of trees. A total of 319 trees were planted, so how many trees were planted by each person on average.
王老师带领一个班的同学去植树．学生们恰好平均分成四组每人植树一样多，共植树319棵，那么平均每人植树多少棵．
<gadget id="calculator">319 / 29</gadget>
<output>11</output>

<result>11</result>