I'll give you a question, please answer with step-by-step reasoning process.
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?

3
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 answer: 3