I took the amount I estimate I would need to retire right now at my current age and divided that by my current hourly rate. So it’s 124,594 working “man-hours”, as you say like 60 years of working. But that value goes down every year I do actually work and as my retirement investments grow.
I assume OP asked it that way to normalize and anonymize it a little.
Can we stop pretending language models know things?