The little boy needs to buy 5 exercise books, and the little girl needs to buy 3 exercise books. The little boy needs to pay 80 cents more than the little girl. How much is each exercise book?
小男孩要买5本练习本，小女孩要买3本练习本，小男孩要比小女孩多付8角钱，每本练习本多少钱？
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<result>4</result>