The school bought 80 literature and art books, which is 10 less than the number of science and technology books (3/4). How many science and technology books are there? (column equation solution)
学校买来文艺书80本，比科技书的(3/4)少10本，科技书有多少本？(列方程解答)
<gadget id="calculator">10 + 80</gadget>
<output>90</output>

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

<gadget id="calculator">90 / (3/4)</gadget>
<output>120</output>

<result>120</result>