We look at the division of 413399 by 1 
We're looking to find how many times 1 goes into 413399.

Let's proceed to step 1:
1 goes into 4 4 times with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 4 away from 4, we end up with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 1

Let's proceed to step 2:
1 divided by 1 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 41.0
If we subtract 1 from 1, we get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 1

Advancing to step 3:
When dividing 3 by 1, we get 3 with a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 413.0
If we take 3 away from 3, we end up with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 1

Advancing to step 4:
1 goes into 3 3 times with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 4133.0
Subtract 3 from 3 to get 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 1

Going ahead to step 5:
1 goes into 9 9 times with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 41339.0
Subtracting 9 from 9 leaves us with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 1

Going ahead to step 6:
1 goes into 9 9 times with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 413399.0
Deduct 9 from 9 and we're left 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.

Advancing to step 7:
When dividing 0 by 1, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 413399.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
1 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 413399.0
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.

The final outcome is 413399.0, with a leftover of 0.0.