Melanie has twice as many cats as Annie, and Annie has three times fewer cats than Jacob. If Jacob has 90 cats, how many cats does Melanie have?
Thoughts? Step-by-step reasoning:

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
Annie has 90 / 3 = 30 cats. Melanie has 30 * 2 = 60 cats.
Thus, the answer is 60.