Come up with a question and reasoning that would justify this answer: 9

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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The question is: Jack bought 55 apples. He wants to give 10 to his father and then equally share the remaining apples between him and his 4 friends. How many apples will each of them get?
Step-by-step reasoning process: The number of apples remaining after Jack gave his father 10 is 55 - 10 = 45. The share each one of his friends including him will get is 45 / 5 = 9.
