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You are describing a formula like this, where {Production Time} is another column in the table:
DATEADD(TODAY(), {Production Time}, 'days')
However, the above formula will always show a new value every day.
Typically people calculate a date based on a fixed start date, such as the record creation date:
DATEADD(CREATED_TIME(), {Production Time}, 'days')
or date in another field:
DATEADD({Start Date}, {Production Time}, 'days')