= 14.4÷ 1.2

= 12 (piece)

16- 12=4 (pieces)

A: Octagonal stamps 12, and 2 yuan stamps 4.

Note: If the stamps of 16 are all from 2 yuan, it is 32 yuan, surpassing 17.6 yuan and 14.4 yuan. Because they are all calculated according to 2 yuan, the excess is calculated according to 0.8 yuan stamps in 2 yuan. Each piece exceeds 2-0.8= 1.2 yuan. So the octagonal stamp is14.4÷1.2 =12.

This problem is similar to the problem that chickens and rabbits are in the same cage. Take your time. Understandable.

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