Xiao Ming buys 16 exercise books, Xiao Hong buys 14 exercise books, Xiao Ming pays 1 yuan more than Xiao Hong, how much is each exercise book.
小明买16本练习本，小红买14本练习本，小明比小红多付1元钱，每本练习本多少钱．
<gadget id="calculator">16 - 14</gadget>
<output>2</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>