One tablet should suffice, though it is always better to go for a fresh Calcium source like milk or Oranges.
There are many factors that figure in to what is right for you. Depending on age and if your male or female...check out this site: ods.od.nih.gov/factsheets/calcium/ It can help you find the right amount no matter what age you are, and give you examples of good food sources for calcium. Hence, the age old saying you are what you eat...it is better to get your calcium from food sources.
However, before adding supplements to your diet, talk to your doctor. :) Some studies have linked clogged arteries with too much calcium, especially in older people etc...You and your doctor can help determine safe and essential amounts for you. :) Good Luck!
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.