Readit NewsThe question asks for the heaviest, which I think cannot be more than three times the normal weight, and probably no less than 1.3. That lands me at 15--600 tonnes using primitive arithmetic. The calculator in OP suggests 40--320.
The real value is apparently 170, but that doesn't really matter. The process of arriving at an interval that is as wide as necessary but no wider is the point.
Estimation is a skill that can be trained. It is a generic skill that does not rely on domain knowledge beyond some common sense.
How you get good at being a generalist is the tricky part, my best bet is reading and doing a lot of trivia (I found crosswords to be somewhat effective at this, but far from being efficient)
My doctor's advice (which is also official government advice for high cholestorol) was two egg yellows max every week - that includes any foods that use egg yellows.
Egg whites you have more leeway and theoretically one could use 6 egg whites every day but that would include heavy exercise.