The school bought back 80 literature and art books and 80 science and technology books, each literature and art book was 5 yuan, and each science and technology book was 6 yuan. How much was the total cost?
学校买回文艺书和科技书各80本，每本文艺书5元，每本科技书6元，一共用了多少钱？
<gadget id="calculator">5 * 80</gadget>
<output>400</output>

<gadget id="calculator">6 * 80</gadget>
<output>480</output>

<gadget id="calculator">400 + 480</gadget>
<output>880</output>

<result>880</result>