What does Zitkala Sa mean by “Eating by Formula”? Explain the formula.

“Eating by Formula”, Zitkala Sa means a set pattern of eating. Accordingly there goes a long bell and the children move in lines to the dinning room. Then there goes another small bell and all the pupils will draw a chair from under the table. After that there goes the third bell. It signals all to sit on their respective seats. Then a man addresses them. After the talk, another bell goes and the eating will start.