The school library purchased a batch of new books, and the students in the three classes of the fourth grade borrowed half of the new books and more than 10 books. As a result, there were 136 new books left in the batch. How many books does each class borrow on average in the fourth grade?
学校图书室购买了一批新图书，四年级三个班级的学生借阅了这批新图书的一半还多10本，结果这批新图书还剩下136本．四年级平均每个班级借图书多少本？
<gadget id="calculator">136 + 10 + 10</gadget>
<output>156</output>

<gadget id="calculator">156 / 3</gadget>
<output>52</output>

<result>52</result>