This year, our school library has added 380 literature and art books, and the number of science and technology books purchased is twice that of literature and art books. How many copies of the two books were purchased in total?
今年我校图书馆增添了380本文艺书，购进的科技书是文艺书的2倍．两种书一共进购了多少本？
<gadget id="calculator">380 * 2</gadget>
<output>760</output>

<gadget id="calculator">760 + 380</gadget>
<output>1_140</output>

<result>1_140</result>