Literary books are twice as many as science and technology books, and comic books are three times as many as science and technology books. It is known that there are 500 literary books, and how many scientific and technological books and comic books are there.
文艺书是科技书的2倍，连环画是科技书的3倍．已知文艺书有500本，科技书、连环画共有多少本．
<gadget id="calculator">500 / 2</gadget>
<output>250</output>

<gadget id="calculator">250 * 3</gadget>
<output>750</output>

<gadget id="calculator">250 + 750</gadget>
<output>1_000</output>

<result>1_000</result>