Madeline wants to drink 100 ounces of water in a day. Her water bottle can hold 12 ounces of water. She refills her water bottle 7 times. How much more water does she need to drink? Give me reasons, before answering the question

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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She has already had 12 * 7 = 84 ounces of water. She needs to drink 100 - 84 = 16 more ounces to make it to 100 ounces. So the final answer is 16.