Xiaofang buys 8 notebooks, pays the salesperson 50 yuan, and the salesperson gives her 18 yuan, how much is each notebook?
小芳买8本笔记本，付给营业员50元，营业员找给她18元，每本笔记本多少元？
<gadget id="calculator">50 - 18</gadget>
<output>32</output>

<gadget id="calculator">32 / 8</gadget>
<output>4</output>

<result>4</result>