Wang Qiang took 12.5 yuan to the store, bought 8 exercise books, and left 6.5 yuan, how much is each exercise book?
王强带了12.5元去商店，买了8个练习本，还剩6.5元，每个练习本多少元？
<gadget id="calculator">12.5 - 6.5</gadget>
<output>6</output>

<gadget id="calculator">6 / 8</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>