There are two batches of books in the library. The number of books in the first batch is 10% more than that in the second batch. If you take 80 books from the first batch to the second batch, the ratio of the number of books in the first batch to the number of the second batch is 3: 4. How many books have been brought into the library in these two batches?
图书馆共进两批图书，第一批图书本数比第二批多10%，如果从第一批拿80本到第二批，这时第一批本数与第二批本数之比是3：4，图书馆这两批图书共进了多少本？
<gadget id="calculator">560 / 1.4</gadget>
<output>400</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">400 * (11/10)</gadget>
<output>440</output>

<gadget id="calculator">440 + 400</gadget>
<output>840</output>

<result>840</result>