[ding_dong_daddy_from_dumas]

You need a better hobby.

It's not a hobby. It's something I learned in the 7th grade and have not forgotten (yet).

[Publius6961]

Liberals' view of the world:

If they can't do it, nobody should be able to do it.

As an engineer/geodesist, I recall that, before desktop computers and scientific calculators, I memorized and actually used the conversion of degrees, minutes and seconds to radians, to 10 decimal places. No biggie.

If you can't do it after a month, you should change professions.