The older brother has 120 books, the younger brother has 40 books, and the older brother gives the younger brother 5 books each time. How many times will the two have the same number of books?
哥哥有120本书，弟弟有40本书，哥哥每次送弟弟5本书，多少次后两个人的书一样多？
<gadget id="calculator">120 - 40</gadget>
<output>80</output>

<gadget id="calculator">80 / 2 / 5</gadget>
<output>8</output>

<result>8</result>