The school library bought back 12 packs of books, each with 4 books. 25 yuan each, how much did you spend on these books?
学校图书室买回12包书，每包4本．每本25元，买这些书一共花了多少元钱？
<gadget id="calculator">25 * 4 * 12</gadget>
<output>1_200</output>

<result>1_200</result>