Xiaodong bought 8 notebooks, paid the salesperson 20 yuan, and got 1.6 yuan back. How much is each notebook?
小东买8本笔记本，付给营业员20元，找回1.6元．每本笔记本是多少元？
<gadget id="calculator">20 - 1.6</gadget>
<output>18.4</output>

<gadget id="calculator">18.4 / 8</gadget>
<output>2.3</output>

<result>2.3</result>