403968 ÷ 39 
We want to divide 403968 by 39.

Going ahead to step 1:
39 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 39

On to step 2:
39 goes into 40 1 times with a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 39 from 40, we get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 39

Advancing to step 3:
When dividing 13 by 39, we get 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we take 0 away from 13, we end up with 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 39

Step 4:
39 can be fit into 139 3 times, resulting in a remainder of 22.
Write down 3 as next digit of the result. 
Result so far: 103.0
If we subtract 117 from 139, we get 22.
Include the next digit (6) from the dividend after 22, then repeat: 226 / 39

Moving on to step 5:
When dividing 226 by 39, we get 5 with a remainder of 31.
Put 5 as the next digit of the answer. 
Result so far: 1035.0
Deduct 195 from 226 and we're left with 31.
Fetch the next digit (8) from the dividend, attach it to 31 and continue: 318 / 39

Going ahead to step 6:
If we divide 318 by 39, we get 8 and a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 10358.0
The remainder is 6 after subtracting 312 from 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
39 goes into 60 1 times with a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 10358.1
The remainder is 21 after subtracting 39 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 8:
210 divided by 39 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 10358.15
Subtracting 195 from 210 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 9:
39 can be fit into 150 3 times, resulting in a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 10358.153
Subtract 117 from 150 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 10:
If we divide 330 by 39, we get 8 and a remainder of 18.
The next digit of our result is 8. 
Result so far: 10358.1538
Deduct 312 from 330 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 11:
180 divided by 39 is 4 with a remainder of 24.
Put 4 as the next digit of the answer. 
Result so far: 10358.15384
The remainder is 24 after subtracting 156 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 12:
39 can be fit into 240 6 times, resulting in a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 10358.153846
The remainder is 6 after subtracting 234 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 13:
If we divide 60 by 39, we get 1 and a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 10358.1538461
Subtracting 39 from 60 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 14:
210 divided by 39 is 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 10358.15384615
Subtracting 195 from 210 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

In conclusion, the division gives 10358.15384615 with a balance of 1.5e-08.