Teacher Li bought a batch of books, if every pack of 12 books is just finished, if every pack of 16 books is just finished, how many books did Mr. Li buy at least?
李老师买来一批图书，如每12本一包，正好包完；如每16本一包，也正好包完，李老师至少买了多少本图书．
<gadget id="calculator">2 * 2 * 2 * 2 * 3</gadget>
<output>48</output>

<result>48</result>