Xinmin Primary School bought some extracurricular reading materials and distributed them to 15 classes on average. Each class got 40 books, and there were 25 books left. How many books did you buy in total?
新民小学买来一些课外读物，平均分给15个班，每班分到40本，还剩下25本．一共买来多少本书？
<gadget id="calculator">40 * 15</gadget>
<output>600</output>

<gadget id="calculator">600 + 25</gadget>
<output>625</output>

<result>625</result>