There is an extra-curricular book, B reads 25% more pages than A every day, A takes 20 days to finish reading this book, how many days does B finish reading?
有一本课外读物，乙每天读的页数比甲多25%，这本书甲用了20天读完，那么乙几天读完？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<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">(1/20) * (5/4)</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">1 / (1/16)</gadget>
<output>16</output>

<result>16</result>