There are 300 scientific and technological books in the library, 130 less cultural books than scientific and technological books, and twice as many comic books as the sum of scientific and cultural books. How many comic books are there in the library?
图书馆有科技书300本，文化书的本数比科技书少130本，连环画的本数是科技书与文化书总和的2倍，图书馆有多少本连环画？
<gadget id="calculator">300 - 130</gadget>
<output>170</output>

<gadget id="calculator">170 + 300</gadget>
<output>470</output>

<gadget id="calculator">470 * 2</gadget>
<output>940</output>

<result>940</result>