Xiao Jiang finished reading a book in 3 days. He read 20% of the book on the first day, read 20% more on the second day than the first day, and read 28 pages on the third day. How many pages does this book have?
小江3天看完一本书，第一天看了全书的20%，第二天比第一天多看了20%，第三天看了28页，这本书共有多少页？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(1/5) * (6/5)</gadget>
<output>6/25 = around 0.24</output>

<gadget id="calculator">1 - (1/5) - (6/25)</gadget>
<output>14/25 = around 0.56</output>

<gadget id="calculator">28 / (14/25)</gadget>
<output>50</output>

<result>50</result>