A 20-meter-long iron wire is divided into 8 parts on average. Uncle Wang used up 7 parts, and Uncle Li used up 1 part. Uncle Wang used up ((())/(())) of this wire, how many meters did Uncle Li use up.
一根20米长的铁丝，平均分成8份，王叔叔用去了其中的7份，李叔叔用去了其中的1份．王叔叔用去了这根铁丝的((())/(()))，李叔叔用去了多少米．
<gadget id="calculator">20 / 8</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>