The school library newly purchased a batch of 126 books. It is planned to be placed on 3 bookshelves, each shelf has 3 layers, how many books are placed on each layer on average?
学校图书室新购进一批图书共有126本．打算放在3个书架上，每个书架有3层，平均每层放几本？
<gadget id="calculator">126 / 3 / 3</gadget>
<output>14</output>

<result>14</result>