Your question isn't fully clear,
but if you are referring to the process of division of numbers,
the "number left over" is called a remainder.
the remainder
The remainder.
That is usually called the "remainder".
We call this left over number the remainder.
its the number left over
The number left over in division is called the remainder.
The remainder.
The remainder.
The numbers left over from dividing a number are called the "remainder".
the remainder
It is called "the remainder"
The remainder.
That is usually called the "remainder".
We call this left over number the remainder.
It is called " junk"
The number 4 is called a remainder
its the number left over