There are 23 story books distributed to 3 classes, 11 to class 1, and the rest are divided equally to class 2 and class 3. How many books are distributed to class 2?
有23本故事书分给3个班，分给一班11本，其余平均分给二班和三班，二班分到几本？
<gadget id="calculator">23 - 11</gadget>
<output>12</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>