The school bought three kinds of books, among which the number of literature and art books accounted for (1/4) of the total, and the number of science books (3/4) was the number of story books, and the number of story books was 120 more than the number of science books. How many books are there in total? Book?
学校买来三种书，其中文艺书的本数占总数的(1/4)，科技书的本数是故事书的(3/4)，故事书比科技书多120本，三种书一共有多少本？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 / (1/4)</gadget>
<output>480</output>

<gadget id="calculator">480 * (3/4)</gadget>
<output>360</output>

<gadget id="calculator">480 + 360</gadget>
<output>840</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">840 / (3/4)</gadget>
<output>1_120</output>

<result>1_120</result>