Science and technology books in the library account for 25% of the library's collection. If the library has 12,000 science and technology books, how many books does the library have?
图书馆科技书占该馆藏书的25%，如果该馆有科技书1.2万册，那么该馆藏书多少万册？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1.2 / (1/4)</gadget>
<output>4.8</output>

<result>4.8</result>