The library has newly purchased a batch of story books and science books, among which there are 905 story books, and science books are five times the number of story books. How many books have the library bought in total this time?
图书馆新买进一批故事书和科技书，其中故事书有905本，科技书是故事书的5倍，图书馆这次一共买进多少本图书？
<gadget id="calculator">905 * 5</gadget>
<output>4_525</output>

<gadget id="calculator">4_525 + 905</gadget>
<output>5_430</output>

<result>5_430</result>