Xiaohong bought 12 exercise books for 10 yuan, and got back 2.8 yuan. How much is each exercise book?
小红用10元钱买了12个练习本，找回2.8元，每个练习本多少钱？
<gadget id="calculator">10 - 2.8</gadget>
<output>7.2</output>

<gadget id="calculator">7.2 / 12</gadget>
<output>0.6</output>

<result>0.6</result>