The school bought a new batch of books, which are put on 3 bookshelves on average. Each bookshelf has 6 layers, and each layer contains 7 books. How many new books did the school buy in total?
学校新买来一批图书，平均放在3个书架上，每个书架有6层，每层放了7本书，学校一共买来多少本新书？
<gadget id="calculator">6 * 3 * 7</gadget>
<output>126</output>

<result>126</result>