Read a book, read the whole book (1/8) on the first day, and read the whole book (3/16) on the second day, read 5 pages less on the first day than on the second day, how many pages does this book have ?
看一本书，第一天看了全书的(1/8)，第二天看了全书的(3/16)，第一天比第二天少看了5页，这本书有多少页？
<gadget id="calculator">3 / 16</gadget>
<output>3/16 = around 0.1875</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(3/16) - (1/8)</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">5 / (1/16)</gadget>
<output>80</output>

<result>80</result>