Xiaodong reads a book, he reads the whole book (1/8) on the first day, reads the whole book (3/8) on the second day, and reads the whole book (7/16) on the third day, and reads it in three days What fraction of this book?
小东看一本书，第一天看了全书的(1/8)，第二天看了全书(3/8)，第三天看了全书的(7/16)，三天共看了这本书的几分之几？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">7 / 16</gadget>
<output>7/16 = around 0.4375</output>

<gadget id="calculator">(1/8) + (3/8) + (7/16)</gadget>
<output>15/16 = around 0.9375</output>

<result>15/16 = around 0.9375</result>