There are 1400 comic books and 1400 story books in the library. If there are 120 more comic books and 300 fewer story books, then the number of comic books and story books is equal. How many comic books are there?
图书室共有连环画，故事书1400册，如果连环画增加120册，故事书少300册，则连环画和故事书的本数相等，连环画有多少册？
<gadget id="calculator">120 - 300</gadget>
<output>-180</output>

<gadget id="calculator">1_400 + (-180)</gadget>
<output>1_220</output>

<gadget id="calculator">1_220 / 2</gadget>
<output>610</output>

<gadget id="calculator">610 - 120</gadget>
<output>490</output>

<result>490</result>