A number of people complete a work task. Since 6 people cannot participate in the work, the construction period will be 2 days longer than the original plan, and 2 people will be transferred before the start of the work. The result is that the construction period is 4 days longer than the original plan. Ask how many days the original planned construction period is. ?
若干人完成一项工作任务，由于工作需要6人不能参加，工期将比原计划多2天，在临开工时又调走2人，结果工期比原计划多4天，问原计划工期多少天？
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