A bookshelf has three layers, with an average of 22 books on each layer. There are 29 such bookshelves in the library, how many books can be placed?
一个书架有三层，平均每层有22本书．图书馆里有29个这样的书架，可以放多少本书？
<gadget id="calculator">22 * 3</gadget>
<output>66</output>

<gadget id="calculator">66 * 29</gadget>
<output>1_914</output>

<result>1_914</result>