In May, there are 31 days.
If Elizabeth is taking the daily recommendation, she will be taking 29,512 milligrams f vitamin D.
In a gram, there are 1000 milligrams.
Therefore, you need to divide 29,512 by 10000.
29,512/1000= 29.512
Thus, Elizabeth has taken 29.512 GRAMS of Vitamin D in May.
Hope this helps :)