I read (3/8) of the whole book on the first day, and (3/4) of the first day on the second day. I read ((())/(()) of this book in two days )).
一本书第一天看了全书的(3/8)，第二天看的是第一天的(3/4)，两天共看了这本书的((())/(()))．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/8) * (3/4)</gadget>
<output>9/32 = around 0.28125</output>

<gadget id="calculator">(3/8) + (9/32)</gadget>
<output>21/32 = around 0.65625</output>

<result>21/32 = around 0.65625</result>