The unit price of "Xinhua Dictionary" is 12 yuan, and the unit price of pens is 8 yuan. After Mr. Li bought 5 pens with 100 yuan, how many copies of "Xinhua Dictionary" can he buy with the remaining money?
《新华字典》的单价是12元，钢笔的单价是8元，李老师带了100元买了5支钢笔后，剩下的钱还能买几本《新华字典》？
<result>4</result>