We look at the division of 392128 by 39 
We want to figure out the number of times 392128 can be divided by 39.

Going ahead to step 1:
39 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 39

Moving on to step 2:
39 can be fit into 39 1 times, resulting in a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 39 from 39 and we're left with 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 39

Going ahead to step 3:
2 divided by 39 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 39

Advancing to step 4:
39 can be fit into 21 0 times, resulting in a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
If we take 0 away from 21, we end up with 21.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 39

Moving on to step 5:
39 can be fit into 212 5 times, resulting in a remainder of 17.
The next digit of our result is 5. 
Result so far: 1005.0
If we subtract 195 from 212, we get 17.
Take the next digit (8) from the dividend and append it to 17, then repeat: 178 / 39

On to step 6:
The number 39 fits into 178 4 times, leaving a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 10054.0
If we subtract 156 from 178, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 7:
The number 39 fits into 220 5 times, leaving a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 10054.5
If we take 195 away from 220, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 8:
250 divided by 39 is 6 with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 10054.56
If we subtract 234 from 250, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
If we divide 160 by 39, we get 4 and a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 10054.564
Subtract 156 from 160 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.

Going ahead to step 10:
When dividing 40 by 39, we get 1 with a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 10054.5641
If we subtract 39 from 40, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 11:
39 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 10054.5641
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.

On to step 12:
39 goes into 100 2 times with a remainder of 22.
Record the quotient 2 as the next digit in the result. 
Result so far: 10054.564102
Deduct 78 from 100 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 13:
39 goes into 220 5 times with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 10054.5641025
The remainder is 25 after subtracting 195 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 14:
39 goes into 250 6 times with a remainder of 16.
The next digit of our result is 6. 
Result so far: 10054.56410256
If we take 234 away from 250, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 10054.56410256 with a remaining 1.6e-08.