There are 1530 literature and art books in the school library, 30 more science and technology books (3/4) than literature and art books (2/3), how many science and technology books are there?
学校图书馆有文艺书1530本，科技书的(3/4)比文艺书的(2/3)多30本，科技书有多少本？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1_530 * (2/3)</gadget>
<output>1_020</output>

<gadget id="calculator">1_020 + 30</gadget>
<output>1_050</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1_050 / (3/4)</gadget>
<output>1_400</output>

<result>1_400</result>