The library has 300 science and technology books, and the number of literature and art books is 150 more than that of science and technology books. The number of comic books is twice the sum of science and art books. How many comic books are there in the library?
图书馆有科技书300本，文艺书的本数比科技书多150本．连环画的本数是科技书与文艺书总和2倍，图书馆有多少本连环画？
<gadget id="calculator">300 + 150 + 300</gadget>
<output>750</output>

<gadget id="calculator">750 * 2</gadget>
<output>1_500</output>

<result>1_500</result>