Give the step-by-step reasoning process and then the final answer. Mark has a really bad headache. He takes 2 Tylenol tablets of 500 mg each and he does every 4 hours for 12 hours. How many grams of Tylenol does he end up taking?
He takes 12 / 4 = 3 doses. Each dose is 500 * 2 = 1000 mg. So he takes 3 * 1000 = 3000 mg. So he takes 3000 / 1000 = 3 grams of Tylenol.
The final answer: 3.