How do you conver 0.001g to mg?
To convert .001g to mg you need to know that 1g is equal to
1000mg. So you want to setup a multiplication and division problem
that will cancel out the sign of grams as you go along.
.001g/1*1000mg/1g=1mg.
When you take the .001g/1g, the g symbol goes away. You can
times it by 1000mg/1g because 1000mg is equal to 1g.