The two brothers each have a number of books, the elder brother has 60 books, and the younger brother has 36 books. Every day the elder brother gives the younger brother 2 books. How many days later will the two brothers have the same number of books?
兄弟俩各有书若干本，哥哥有60本，弟弟有36本，每天哥哥送给弟弟2本书．多少天后兄弟俩的书就一样多了？
<gadget id="calculator">60 - 36</gadget>
<output>24</output>

<gadget id="calculator">24 / 2 / 2</gadget>
<output>6</output>

<result>6</result>