What was the question for this implicit rationale, and corresponding answer?
Jessica's pumpkin weighs half the weight of Brad's 54 - pound pumpkin so 54 / 2 = 27 pounds. Betty's pumpkin weighs 4 times the amount of Jessica's 27 - pound pumpkin so it weighs 4 * 27 = 108. Betty has the heaviest pumpkin at 108 pounds while Jessica's is the lowest at 27 pounds so the difference is 108 - 27 = 81 pounds.
 The answer: 81
The question: The county fair was hosting a pumpkin contest to see who could grow the biggest pumpkin in pounds. Brad entered his pumpkin with a weight of 54 pounds. Jessica's was half the weight of Brad's. Betty's pumpkin weight 4 times the amount of Jessica's pumpkin. What is the difference between the heaviest and lightest pumpkin in pounds?