There are 690 literature and art books in the school library, and the number of science and technology books is (2/5) that of literature and art books. How many fewer science and technology books than literature and art books?
学校图书馆有文艺书690本，科技书的本数是文艺书的(2/5)，科技书比文艺书少多少本？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">690 * (2/5)</gadget>
<output>276</output>

<gadget id="calculator">690 - 276</gadget>
<output>414</output>

<result>414</result>