Coco has 100 story books, and Xiaoxiao has 58 story books. Each time, take 3 books from Coco for Xiaoxiao. How many times do you have to take it? Both of them have the same number of books.
可可有100本故事书，小小有58本故事书，每次从可可那里拿3本给小小．要拿多少次，两人的书同样多．
<gadget id="calculator">100 - 58</gadget>
<output>42</output>

<gadget id="calculator">42 / 2 / 3</gadget>
<output>7</output>

<result>7</result>