Xiao Ming finished reading a book in three days. He read (1/3) of the whole book on the first day and the rest (2/5) on the second day. It is known that he read 24 pages less on the second day than on the third day. How many pages are there in this book?
小明三天看完一本书，第一天看了全书的(1/3)，第二天看了余下的(2/5)，已知第二天比第三天少看24页，这本书共多少页？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(2/3) * (2/5) * 2</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">1 - (1/3) - (8/15)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">24 / (2/15)</gadget>
<output>180</output>

<result>180</result>