The first thing I learned was that after age 40, adults, on average, accumulate a pound of fat per year. And the best way to temper that gain is through regular exercise. I then learned that maximum benefits are derived when physical activity takes place three times a week and heart rate is elevated for at least 20 minutes during each session. I was able to certify all these computations using calculators I found on the Internet. If there is anything that needs calculating, no matter how arcane the subject, there is a free calculator out there to help crunch the numbers.
Some results are interesting but of questionable use.
I know I was born on a Thursday, under the sign of the Earth Dragon during year 4566 of the Chinese calendar. And my Social Security number was issued in Rhode Island and my numerology numbers are 6 for destiny and 1 for challenge - even though I haven't the foggiest idea what they mean. Most calculators are practical. For example, if I had an airplane and wanted to fly from Barnstable to Syracuse, there is a calculator that will measure the great circle distance for me, do weight and balance calculations, and tell me how much fuel I would need for certain wind and temperature conditions. There are calculators to help me figure out if a reverse mortgage is a good idea, and there are dozens of sponsored calculators for financial dealings ranging from mortgages to money market yields.