Read a book, read it (3/8) on the first day, and read it (2/8) on the second day, how much more of the book did you read on the first day than on the second day.
看一本书，第一天看了它的(3/8)，第二天看了它的(2/8)，第一天比第二天多看了这本书的多少．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/8) - (1/4)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>