The library has 154,200 volumes of story books. 58,000 fewer than the technical books, how many thousands of technical books are there?
图书馆有故事书15.42万册．比科技书少5.8万册，科技书有多少万册？
<gadget id="calculator">15.42 + 5.8</gadget>
<output>21.22</output>

<result>21.22</result>