We're dividing 128957 by 39 
Our goal is to divide 128957 by 39.

Advancing to step 1:
If we divide 1 by 39, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 39

Step 2:
When dividing 12 by 39, we get 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 39

Step 3:
When dividing 128 by 39, we get 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 117 from 128, we get 11.
Take the next digit (9) from the dividend and append it to 11, then repeat: 119 / 39

Going ahead to step 4:
119 divided by 39 is 3 with a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 33.0
If we subtract 117 from 119, we get 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 39

Moving on to step 5:
39 goes into 25 0 times with a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 330.0
The remainder is 25 after subtracting 0 from 25.
Grab the next digit (7) from the dividend, add it to 25, then carry on: 257 / 39

Step 6:
39 can be fit into 257 6 times, resulting in a remainder of 23.
Record the quotient 6 as the next digit in the result. 
Result so far: 3306.0
If we take 234 away from 257, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 7:
If we divide 230 by 39, we get 5 and a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 3306.5
If we subtract 195 from 230, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 8:
350 divided by 39 is 8 with a remainder of 38.
Write down 8 as next digit of the result. 
Result so far: 3306.58
The remainder is 38 after subtracting 312 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 9:
The number 39 fits into 380 9 times, leaving a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 3306.589
If we subtract 351 from 380, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 10:
39 goes into 290 7 times with a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 3306.5897
Subtracting 273 from 290 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 11:
If we divide 170 by 39, we get 4 and a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 3306.58974
Subtracting 156 from 170 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 12:
39 goes into 140 3 times with a remainder of 23.
Write down 3 as next digit of the result. 
Result so far: 3306.589743
If we subtract 117 from 140, we 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.

Let's proceed to step 13:
230 divided by 39 is 5 with a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 3306.5897435
Subtracting 195 from 230 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 14:
If we divide 350 by 39, we get 8 and a remainder of 38.
Use 8 as the next digit of our solution. 
Result so far: 3306.58974358
Subtract 312 from 350 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

After the division, we end up with 3306.58974358 and a remainder of 3.8e-08.