How much does Kong Yiji owe the hotel?

There is a passage in Kong Yiji written by Lu Xun: Since then, I haven't seen Kong Yiji for a long time. At the end of the year, the shopkeeper took off the powder board and said, "Kong Yiji still owes nineteen dollars!" On the Dragon Boat Festival the following year, he said, "Kong Yiji still owes nineteen dollars!" I didn't say anything until the Mid-Autumn Festival, and I didn't see him at the end of the year. It can be concluded that Kong Yiji owes the hotel 19 yuan.

in Kong Yiji, a novel by Mr. Lu Xun, from the perspective of a hotel waiter, Kong Yiji, a figure poisoned by feudal decadent ideas and the imperial examination system, was written.