Cut a section of wire, cut the full length (3/8) for the first time, and cut the full length (1/8) for the second time, what fraction of the full length is the rest?
截一段电线，第一次截了全长的(3/8)，第二次截了全长的(1/8)，剩下的是全长的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">1 - (3/8) - (1/8)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>