Xiao Ming finished reading a novel within three days. The number of pages read on the first day is 5 pages more than (1/3) of the total number of pages, and the number of pages read on the second day is 10 pages less than 50% of the total number of pages. It is known that the number of pages read in the first two days is equal. How many pages does this book have?
小明三天内看完一本小说．第一天看的比总页数的(1/3)多5页，第二天看的比总页数的50%少10页，已知前两天看的页数相等．这本书有几页？
<gadget id="calculator">5 + 10</gadget>
<output>15</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">15 / (1/6)</gadget>
<output>90</output>

<result>90</result>