When Xiao Ming reads a book, the ratio of the number of pages he has read to the number of unread pages on the first day is 1:5. After reading another 60 pages, the ratio of the number of pages he has read to the number of unread pages is 3:5. How many pages does this book have?
小明读一本书，第一天已读的页数和未读的页数比是1：5，又读了60页后，已读的页数和未读的页数比是3：5，这本书一共有多少页？
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(3/8) - (1/6)</gadget>
<output>5/24 = around 0.208333</output>

<gadget id="calculator">60 / (5/24)</gadget>
<output>288</output>

<result>288</result>