Xiaojun has m extracurricular books, if he distributes 4 books to Xiaoming, they both have the same number of books, how many books did Xiaoming originally have.
小军有m本课外书，如果分给小明4本，两人的书就一样多，小明原来有多少本．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>