Xiao Ming and Xiao Hua spent the same amount of money to buy the same number of exercise books. After buying, Xiao Ming took 4 more books than Xiao Hua. As a result, Xiao Ming paid Xiao Hua 3 yuan, how much each exercise book was.
小明和小华拿同样多的钱买同样多的练习本，买完后，小明比小华多拿了4本，结果，小明付给小华3元钱，练习本每本多少元．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>