Xiaojun has 14 books, and Xiaolan has twice as many books as Xiaojun. How many books do they share?
小军有图书14本，小兰的图书是小军的2倍，两人共有图书多少本？
<gadget id="calculator">14 * 2</gadget>
<output>28</output>

<gadget id="calculator">28 + 14</gadget>
<output>42</output>

<result>42</result>