Jackson's oldest son gets 4 cookies after school and his youngest son gets 2 cookies after school. If there are 54 cookies in a box, how many days will the box last? Let's be accurate as possible.

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.
user
The oldest son gets 4 cookies and the youngest gets 2, so every day they eat 4 + 2 = 6 cookies. There are 54 cookies in a box and the boys eat 6 cookies a day, so the box will last 54 / 6 = 9 days.
The answer: 9.