rectangular paper strip, cut off (1/2) of it for the first time, (1/2) of the remaining part for the second time, and (1/2) of the remaining part for the third time, then the remaining How much does the lower part take up on this note?
一张长方形纸条，第一次剪去它的(1/2)，第二次剪去剩余部分的(1/2)，第三次再剪去剩余部分的(1/2)，那么剩下部分占这张纸条的多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * (1/2)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/2) - (1/4) - (1/8)</gadget>
<output>1/8 = around 0.125</output>

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