Teacher Wang distributed some exercise books to 8 students on average, each with 3 books and 1 book left. How many exercise books did Teacher Wang have?
王老师把一些练习本平均分给8个同学，每人3本，还剩下1本，王老师原来有多少本练习本？
<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">24 + 1</gadget>
<output>25</output>

<result>25</result>