There are 120 science fiction books in the library, and 35 story books are 4 times more than science fiction books. How many storybooks are there in the library?
图书馆有科幻书120本，故事书比科幻书的4倍还多35本．图书馆里有多少本故事书？
<gadget id="calculator">120 * 4</gadget>
<output>480</output>

<gadget id="calculator">480 + 35</gadget>
<output>515</output>

<result>515</result>