Word problem, inspired by NASA moon clocks:

Quito is 2820m above sea level. I live at sea-level. From my perspective, about how much is the life expectancy of a Quito-an reduced by virtue of gravitational time dilation?

(see https://en.wikipedia.org/wiki/Gravitational_time_dilation ht @dpp the formulas are right there so it's just plug 'n chug, right? right?)