We look at the division of 6419 by 1 
We want to divide 6419 by 1.

Going ahead to step 1:
6 divided by 1 is 6 with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Deduct 6 from 6 and we're left with 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 1

On to step 2:
1 can be fit into 4 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 64.0
Subtract 4 from 4 to get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 1

Going ahead to step 3:
1 can be fit into 1 1 times, resulting in a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 641.0
If we take 1 away from 1, we end up with 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 1

Let's proceed to step 4:
When dividing 9 by 1, we get 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 6419.0
Subtract 9 from 9 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 5:
1 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6419.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 6:
The number 1 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6419.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 6419.0 with a balance of 0.0.