Xiao Ming and Xiao Fang bought the same exercise book in the store, Xiao Ming bought 3 books, Xiao Fang bought 5 books, Xiao Ming paid 5 yuan less than Xiao Fang. How much is each exercise book?
小明和小芳商店购买同样的练习本，小明买了3本，小芳买了5本，小明比小芳少付5元．每本练习本多少元？
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>