Please use the method of "equivalent replacement" to calculate: 1 pig can be exchanged for 4 sheep and 2 sheep for 6 rabbits, so how many rabbits can 5 pigs be exchanged?
Answer: 2 sheep = 6 rabbits, so 1 sheep = 3 rabbits, so 4 sheep can be exchanged for 4×3 = 12 rabbits, so 1 pig can be exchanged for 12 rabbits, and 5 pigs can be exchanged for12× 2 rabbits.