piece of wire, the first cut off (3/8), the second cut off as much as the first time, what fraction is left?
一根铁丝，第一剪去(3/8)，第二次剪去与第一次同样多，还剩几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>