A story book, Xiao Ming read this book (1/3) on the first day, read this book more (1/5) on the second day than the first day, and read this book in total in two days ((())/(())).
一本故事书，小明第一天看了这本书的(1/3)，第二天比第一天多看了这本书的(1/5)，两天总共看了这本书的((())/(()))．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) + (1/5) + (1/3)</gadget>
<output>13/15 = around 0.866667</output>

<result>13/15 = around 0.866667</result>