A batch of books was shipped from the bookstore. The first day they sold this batch of books (5/12), and the second day they sold another 160 books. There are 120 books left. How many books are there in total?
书店运来一批书，第一天售出这批书的(5/12)，第二天又售出160本，还剩120本，这批书一共有多少本？
<gadget id="calculator">160 + 120</gadget>
<output>280</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1 - (5/12)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">280 / (7/12)</gadget>
<output>480</output>

<result>480</result>