Smiling and reading a "Celebrity Story", I read 10% of the book in the first week, and then read 45 pages. At this time, the ratio of the number of pages I have read to the number of remaining pages is 2:3 ． How many pages does this "Celebrity Story" have?
笑笑看一本《名人故事》，第一周看了这本书的10%，接下来又看了45页，这时已经看了的页数和剩下的页数的比是2：3．这本《名人故事》一共有多少页？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(2/5) - (1/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">45 / (3/10)</gadget>
<output>150</output>

<result>150</result>