Fangfang bought 6 identical exercise books for 10 yuan, and got back 2.8 yuan. How much is each exercise book? (Use arithmetic method to solve first, then formulate solution)
芳芳拿10元钱买了6本同样的练习本，找回2.8元，每本练习本多少钱？(先用算术方法解，再列方程解)
<gadget id="calculator">10 - 2.8</gadget>
<output>7.2</output>

<gadget id="calculator">7.2 / 6</gadget>
<output>1.2</output>

<result>1.2</result>