It costs 5.2 yuan to buy a pencil case, and 2.3 yuan more to buy 5 exercise books than to buy a pencil case. How much is each exercise book?
买一个文具盒5.2元，买5本练习本比买一个文具盒多花2.3元，每本练习本多少元？
<gadget id="calculator">5.2 + 2.3</gadget>
<output>7.5</output>

<gadget id="calculator">7.5 / 5</gadget>
<output>1.5</output>

<result>1.5</result>