Xiaogang reads a book of fairy tales. He reads (3/8) of the whole book on the first day and (2/8) of the whole book on the second day. What fraction of the whole book is left?
小刚看一本童话书，第一天看了全书的(3/8)，第二天看了全书的(2/8)，还剩全书的几分之几？
<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">1 - (3/8) - (1/4)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>