The school library has newly purchased 280 books, which are to be placed on 2 bookshelves. Each shelf has 4 floors. How many new books should be placed on each floor on average?
学校图书馆新买来图书280本，准备放在2个书架上，每个书架有4层，平均每层要放多少本新书？
<gadget id="calculator">280 / 2 / 4</gadget>
<output>35</output>

<result>35</result>