Xiao Ming took 100 yuan to the stationery store to buy stationery, bought a box of colored pens with 25 yuan, and bought 15 notebooks. The money just ran out. How much is each notebook?
小明拿了100元钱去文具店买文具，用25元钱买了一盒彩笔，又买了15本笔记本后钱正好用完，每本笔记本多少钱？
<gadget id="calculator">100 - 25</gadget>
<output>75</output>

<gadget id="calculator">75 / 15</gadget>
<output>5</output>

<result>5</result>