The school bought some books and distributed them to 15 classes, each class had 66 books, and there were 360 books left. How many books did the school buy in total?
学校买来一些书，分给15个班，每班66本，还剩下360本，学校一共买来多少本书？
<gadget id="calculator">15 * 66</gadget>
<output>990</output>

<gadget id="calculator">990 + 360</gadget>
<output>1_350</output>

<result>1_350</result>