Xiaodong reads a book. He reads (3/8) of the whole book on the first day and (1/3) of the whole book on the second day. What fraction of the whole book is left?
小东看一本书，第一天看了全书的(3/8)，第二天看了全书的(1/3)，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">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (3/8) - (1/3)</gadget>
<output>7/24 = around 0.291667</output>

<result>7/24 = around 0.291667</result>