Xiaofang reads a technical book. I read 16 pages on the first day, and (1/5) of the whole book on the second day. I read 25% more pages on the second day than on the first day. How many pages does this book have?
小芳看一本科技书．第一天看了16页，第二天看了全书的(1/5)，第二天看的页数比第一天多25%．这本书一共有多少页？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(5/4) / (1/5)</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">16 * (25/4)</gadget>
<output>100</output>

<result>100</result>