Xiaohong reads a book and has already read 60 pages. The ratio of the pages she has read to the pages she has not read is 2:5. How many pages are there in this book?
小红看一本书，已经看了60页，看了的和未看的比是2：5，这本书共多少页？
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">2 + 5</gadget>
<output>7</output>

<gadget id="calculator">30 * 7</gadget>
<output>210</output>

<result>210</result>