We're dividing 399566 by 29 
Our goal is to divide 399566 by 29.

Advancing to step 1:
29 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 29

On to step 2:
The number 29 fits into 39 1 times, leaving a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 29 from 39 to get 10.
Grab the next digit (9) from the dividend, add it to 10, then carry on: 109 / 29

Let's proceed to step 3:
109 divided by 29 is 3 with a remainder of 22.
The next digit of our result is 3. 
Result so far: 13.0
The remainder is 22 after subtracting 87 from 109.
Append the next digit (5) from the dividend to 22 and continue with: 225 / 29

On to step 4:
225 divided by 29 is 7 with a remainder of 22.
Put 7 as the next digit of the answer. 
Result so far: 137.0
Subtracting 203 from 225 leaves us with 22.
Fetch the next digit (6) from the dividend, attach it to 22 and continue: 226 / 29

On to step 5:
29 goes into 226 7 times with a remainder of 23.
Use 7 as the next digit of our solution. 
Result so far: 1377.0
Subtract 203 from 226 to get 23.
Bring next digit (6) of the dividend behind the 23 and repeat the process: 236 / 29

Going ahead to step 6:
29 can be fit into 236 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 13778.0
Subtract 232 from 236 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
The number 29 fits into 40 1 times, leaving a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 13778.1
Subtract 29 from 40 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 8:
110 divided by 29 is 3 with a remainder of 23.
Write down 3 as next digit of the result. 
Result so far: 13778.13
Subtract 87 from 110 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 9:
If we divide 230 by 29, we get 7 and a remainder of 27.
The next digit of our result is 7. 
Result so far: 13778.137
Deduct 203 from 230 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 10:
29 can be fit into 270 9 times, resulting in a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 13778.1379
Deduct 261 from 270 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 11:
29 can be fit into 90 3 times, resulting in a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 13778.13793
The remainder is 3 after subtracting 87 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 12:
The number 29 fits into 30 1 times, leaving a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 13778.137931
If we take 29 away from 30, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 13:
The number 29 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 13778.137931
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 14:
29 can be fit into 100 3 times, resulting in a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 13778.13793103
Subtract 87 from 100 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

After the division, we end up with 13778.13793103 and a remainder of 1.3e-08.