Divide an 8-meter-long iron wire into 4 parts on average, and the number representing such 3 parts is written as a fraction ((())/(())). Here, the unit "1" refers to how much.
把一根8米长的铁丝平均分成4份，表示这样的3份的数写成分数是((())/(()))，在这里，单位"1"是指多少．
<result>8</result>