The fourth-grade students Li Ming, Wang Ping and Zhao Xiaohong spent the same amount of money to buy diaries in Yuxing Shopping Mall. After buying them, Li Ming and Wang Ping each bought six more diaries than Zhao Xiaohong. In this way, the two had to give Zhao Xiaohong another 12 yuan, and asked: How much is each exercise book?
四年级学生李明、王平和赵小红三人拿同样多的钱到育兴商场买日记本，买回来后，李明和王平都比赵小红多拿六本．这样两人还要再给赵小红12元，问：每本练习本多少钱？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">6 * 1</gadget>
<output>6</output>

<result>6</result>