Q: John buys 4 pounds of beef. He uses all but 1 pound in soup. He uses twice as many pounds of vegetables as beef. How many pounds of vegetables did he use?
A: He used 4 - 1 = 3 pounds of beef. So he used 3 * 2 = 6 pounds of vegetables. The answer is 6.

Q: Marcy had 22 sodas in her fridge for a party. Her friend Tina came over and gave her 12 plus two times the number of sodas Marcy had before. How many sodas will Marcy have for the party?
A: Two times the sodas Marcy had is 22 * 2 = 44. Tina gave Marcy 44 + 12 = 56 soda. In total Marcy has 22 + 56 = 78 sodas. The answer is 78.

Q: At the pet shop, there were 3 birds, 5 dogs, 4 snakes, and 1 spider for sale. How many legs were there in total?
A:

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 3 birds have 2 legs each, for a total of 3 * 2 = 6 paws. The 5 dogs have 4 legs each, for a total of 5 * 4 = 20 paws. The 1 snake has no paws, and a spider has 8 legs. The total number of paws is 6 + 20 + 8 = 34. The answer is 34.