The library bought back a batch of books. Each shelf can hold 125 books. There are 12 bookshelves, and there are still 630 books that have not been put in. How many books did the school buy back in total?
图书室买回一批图书，每个书架可放125本书，放了12个书架，还有630本没有放进去，学校一共买回多少本书？
<gadget id="calculator">125 * 12</gadget>
<output>1_500</output>

<gadget id="calculator">1_500 + 630</gadget>
<output>2_130</output>

<result>2_130</result>