Wang Yang read a storybook. On the first day, he read (2/15) of the total pages. On the second day, he read 15 more pages than the first day. In two days, he read exactly (1/3) of the total pages. How many pages are there in this book?
汪洋读一本故事书，第一天读了总页数的(2/15)，第二天比第一天多读了15页，两天正好读了总页数的(1/3)．这本书一共多少页？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(2/15) * 2</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(1/3) - (4/15)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">15 / (1/15)</gadget>
<output>225</output>

<result>225</result>