Students A, B, and C each spend the same amount of money to jointly buy exercise books of the same specification. After buying, both A and B want 6 more copies than C. Therefore, A and B give C RMB 0.54 respectively. How much is the price of each exercise book?
甲、乙、丙三个学生各拿出同样多的钱合买同样规格的练习本．买来之后甲和乙都比丙多要6本，因此，甲、乙分别给丙人民币0.54元．求每本练习本的价格是多少元？
<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">0.54 / 2</gadget>
<output>0.27</output>

<result>0.27</result>