Xiao Gang reads a story book, he reads (1/3) of the whole book on the first day, and reads 8 pages on the second day. At this time, the ratio of the number of pages he has read to the number of pages he has not read is 2:3. How many pages does this book have?
小刚看一本故事书，第一天看了全书的(1/3)，第二天又看了8页，这时已看的页数与未看的页数的比是2：3，这本书有多少页？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/5) - (1/3)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">8 / (1/15)</gadget>
<output>120</output>

<result>120</result>