There was an explorer who walked across the desert in 6 days. If a porter can only carry food and water for one person for 8 days, how many workers must the explorer employ at least? (Explorers themselves have to carry expedition equipment, not food and water.)
有一位探险家，用6天时间徒步横穿沙漠．如果一个搬运工人只能运一个人8天的食物和水，那么这个探险家至少要雇用多少名工人．(探险家自己要背探险仪器，不搬食物和水．)
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