The school bought a batch of books, and after distributing these books to the 6 grades in the school, there were 79 books left. If there are 108 books for each grade, how many books are there in total?
学校买来一批图书，把这批图书分给全校6个年级后，还剩下79本．如果每个年级分得108本，买来的这批图书一共有多少本？
<gadget id="calculator">108 * 6</gadget>
<output>648</output>

<gadget id="calculator">648 + 79</gadget>
<output>727</output>

<result>727</result>