Uncle worker laid a section of railway, which has been completed (5/8), how much is still not completed?
工人叔叔铺一段铁路，已经完成了(5/8)，还有几分之几没完成？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>