Naughty finished a book in three weeks. I read 25% of the book in the first week, and the remaining 40% in the second week. I read 54 more pages in the third week than in the second week. How many pages?
淘气三周看完一本书，第一周看了这本书的25%，第二周看了剩下的40%，第三周比第二周多看了54页，淘气第一周看了多少页？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/4) * (2/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/4) - (3/10)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">(9/20) - (3/10)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">54 / (3/20)</gadget>
<output>360</output>

<gadget id="calculator">360 * (1/4)</gadget>
<output>90</output>

<result>90</result>