The school bought back some exercise books and distributed them to 18 classes, each class had 132 books, and there were 40 books left. How many exercise books did the school buy back?
学校买回一些练习本，发给18个班，每班132本，还剩40本．学校买回多少本练习本？
<gadget id="calculator">132 * 18</gadget>
<output>2_376</output>

<gadget id="calculator">2_376 + 40</gadget>
<output>2_416</output>

<result>2_416</result>