Give the step-by-step reasoning process and then the final answer. Clyde and Grace are building block towers. Grace’s tower is 8 times the size of Clyde’s at 40 inches tall. How many inches taller is Grace’s tower than Clyde’s?

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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Clyde’s tower is 1 / 8 the size of Grace’s tower or 40 inches / 8 = 5 inches tall. Grace’s tower is 40 inches – 5 inches = 35 inches taller than Clyde’s.
The final answer: 35.