Xiao Ming reads a book. He reads the whole book (3/7) on the first day, and reads 48 pages on the second day. At this time, the ratio of the number of pages read to the number of unread pages is 3:2. This book has a total of how many pages
小明看一本书，第一天看了全书的(3/7)，第二天看了48页，这时已读的页数与未读页数的比是3：2，这本书共有多少页？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(3/5) - (3/7)</gadget>
<output>6/35 = around 0.171429</output>

<gadget id="calculator">48 / (6/35)</gadget>
<output>280</output>

<result>280</result>