If the money paid by the young man to Wang is counterfeit, it will be regarded that Wang has not received the money from the young man, that is, 0 yuan.
In order to exchange money, Wang paid the money to the neighborhood twice with counterfeit money and real money, which can be regarded as 0+ 100 yuan = 100 yuan.
Therefore, the total amount paid by the king is: 97+ 100 = 197 yuan.
That is, the king's loss 197 yuan.