There are 120 books, placed on 3 bookshelves on average, what fraction of the books on each shelf account for all books? How many
有120本书，平均放在3个书架上，每个书架上的书的本数占全部书的几分之几？多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>