There are 43 books in class 3 and 1, and they are distributed to three groups. The first group has 4 more books than the second group, and the second group has 6 more books than the third group. How many books will the third group get?
三1班有43本书，分给三个小组，第一组比第二组多4本，第二组比第三组多6本，第三组分得几本？
<gadget id="calculator">43 - 6 - 6 - 4</gadget>
<output>27</output>

<gadget id="calculator">1 + 1 + 1</gadget>
<output>3</output>

<gadget id="calculator">27 / 3</gadget>
<output>9</output>

<result>9</result>