Students A, B, and C each spend the same amount of money to buy exercise books with the same unit price. C is a picky person. , both A and B have 6 more books than C, so A and B gave C 1.2 yuan respectively. What is the unit price of each exercise book?
甲、乙、丙三个学生各拿出同样多的钱，合买同样单价的练习本，丙是个比较挑剔的人，买来之后，他又不想要那么多了，又不能退货，无奈之下，甲和乙都比丙多6本，因此甲、乙分别又给了丙人民币1.2元，请问每本练习本的单价是多少元？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">6 * (2/3)</gadget>
<output>4</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<gadget id="calculator">1.2 / 2</gadget>
<output>0.6</output>

<result>0.6</result>