Xiao Ming bought a book, read it on the first day (2/8), read it on the second day (5/8), and finished reading the rest on the third day. How much did Xiao Ming read on the third day?
小明买了一本书，第一天看了(2/8)，第二天看了(5/8)，第三天把剩下的全部看完了，问小明第三天看了多少？
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (1/4) - (5/8)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>