The school bought a batch of books, and after distributing these books to the 6 grades in the school, there were still 70 books left. If each grade gets 105 books, 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70本．如果每个年级分得105本，买来的这批图书一共有多少本？
<gadget id="calculator">105 * 6</gadget>
<output>630</output>

<gadget id="calculator">630 + 70</gadget>
<output>700</output>

<result>700</result>