Answer: 3650 mg
Work: Mg stands for milligrams, and you need this chart to help you with this problem. On this chart, you can see that Gram is in the middle, and you need to get to milligrams (Last One.) Since Milligrams is 3 spots away to the right, you need to move the decimal point 3 spots away to the right. So, after you move the 3.65 three spots, the answer is 3650, meaning the milligrams. So, 3.65 g (Grams) is 3650 milligrams.
I hope this helps, and Happy Holidays! :)