public class Calculator { public double calculate(int pplCount,double amountReceipt){ double result = amountReceipt/(double) pplCount; return mathFloor(result); } public double conversionSum(double price){ return mathFloor(price); } double mathFloor(double sum){ return Math.floor(100*sum)/100.0; } public String formatSum(double price){ int partOfPrice = ((int) price) % 100; if (Double.compare(partOfPrice,14)>0) { partOfPrice = ((int) partOfPrice) % 10; } String nameRub = ""; switch (partOfPrice){ case 1: nameRub = "рубль"; break; case 2: case 3: case 4: nameRub = "рубля"; break; default: nameRub = "рублей"; } return String.format("%.2f %s",price, nameRub); } }