There are 2,500 comic books in the school library, 100 more than 6 times the number of story books. How many story books are there?
学校图书室有连环画2500本，比故事书的6倍还多100本，故事书有多少本？
<gadget id="calculator">2_500 - 100</gadget>
<output>2_400</output>

<gadget id="calculator">2_400 / 6</gadget>
<output>400</output>

<result>400</result>