What is 2.3333333333333333 as a whole number?
Whole numbers are 0, 1, 2, 3, 4, ...
2.333... isn't a whole number; 2.333... is 2 1/3 which is 7/3.
AS you entered it (with 16 decimal places), it is 23 333 333 333 333 333 / 100 000 000 000 000 000.