The school library has 650 science and technology books, and the number of literature and art books is 45 more than three times the number of science and technology books. How many science and literature books are there in the library?
学校图书馆有科技书650本，文艺书本数比科技书本数的3倍多45本，图书馆有科技书、文艺书共多少本．
<gadget id="calculator">650 * 3</gadget>
<output>1_950</output>

<gadget id="calculator">1_950 + 45</gadget>
<output>1_995</output>

<gadget id="calculator">1_995 + 650</gadget>
<output>2_645</output>

<result>2_645</result>