Four. There are 4 bookcases in the book corner of class 1, each bookcase has 7 floors, and 25 books are placed on each floor, how many books are there in the book corner of class 4?
四．一班的图书角有4个书柜，每个书柜有7层，每层放25本书，四•一班图书角共有多少本书？
<gadget id="calculator">4 * 7 * 25</gadget>
<output>700</output>

<result>700</result>