Math
posted by Jerald .
Stephanie got a travel pack of 4 aspirin, each 500 milligrams. How many total grams are in the pack
its not 0.5?

4 * 500 = 2,000 mg
http://www.metricconversions.org/weight/milligramstograms.htm 
How about
A box of specialty baking flour holds 2 kg. How many angel food cakes can be made with a recipe that calls for 100 grams of flour?
This one isnt 2,000? 
for the 2nd one is it 0.1?
100g=0.1kg 
For the aspirin question is 2 grams?

100g = 0.10kg
2kg = 2000g
2000 / 100 = 20 cakes