Full title: Enslaved African mental prodigy Thomas Fuller, the "Virginia Calculator" famously out-calculated standard arithmetic tools in 1780 by factoring leap years into a 70-year-old's age in seconds right on the spot.
"How many seconds did this 70 year old live?" Is the question he answered, therefore the amount of leap years matters. Why there is a modern calculator in the picture or why is the post worded in such a weird way I don't know