The school library bought some books from Xinhua Bookstore. If there are 10 books in a pack, it can be packed just right. If there are 16 books in a pack, it can be finished just right. How many books did the library buy at least? how many copies
学校图书室在新华书店买了一些图书，如果每10本一包，能够正好包完．如果16本一包，也能正好包完．图书室至少买了多少本图书？多少本
<gadget id="calculator">2 * 2 * 2 * 2 * 5</gadget>
<output>80</output>

<result>80</result>