Teacher Wang wants to put 156 books on two bookshelves, and each bookshelf has 3 floors. How many books are placed on each shelf on average?
王老师要把156本图书放在两个书架上，每个书架有3层，平均每个书架每层放多少本图书？
<gadget id="calculator">156 / 2 / 3</gadget>
<output>26</output>

<result>26</result>