We look at the division of 12855788 by 39 
We want to divide 12855788 by 39.

Step 1:
If we divide 1 by 39, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 39

Going ahead to step 2:
39 can be fit into 12 0 times, resulting in a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Bring next digit (8) of the dividend behind the 12 and repeat the process: 128 / 39

Moving on to step 3:
If we divide 128 by 39, we get 3 and a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 117 from 128 leaves us with 11.
Grab the next digit (5) from the dividend, add it to 11, then carry on: 115 / 39

Going ahead to step 4:
115 divided by 39 is 2 with a remainder of 37.
Write down 2 as next digit of the result. 
Result so far: 32.0
The remainder is 37 after subtracting 78 from 115.
Bring next digit (5) of the dividend behind the 37 and repeat the process: 375 / 39

On to step 5:
375 divided by 39 is 9 with a remainder of 24.
Use 9 as the next digit of our solution. 
Result so far: 329.0
The remainder is 24 after subtracting 351 from 375.
Fetch the next digit (7) from the dividend, attach it to 24 and continue: 247 / 39

Let's proceed to step 6:
39 goes into 247 6 times with a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 3296.0
Subtracting 234 from 247 leaves us with 13.
Fetch the next digit (8) from the dividend, attach it to 13 and continue: 138 / 39

Going ahead to step 7:
39 can be fit into 138 3 times, resulting in a remainder of 21.
Put 3 as the next digit of the answer. 
Result so far: 32963.0
Subtract 117 from 138 to get 21.
Grab the next digit (8) from the dividend, add it to 21, then carry on: 218 / 39

Let's proceed to step 8:
If we divide 218 by 39, we get 5 and a remainder of 23.
Put 5 as the next digit of the answer. 
Result so far: 329635.0
Deduct 195 from 218 and we're left 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.

Advancing to step 9:
If we divide 230 by 39, we get 5 and a remainder of 35.
The next digit of our result is 5. 
Result so far: 329635.5
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.

Going ahead to step 10:
When dividing 350 by 39, we get 8 with a remainder of 38.
Record the quotient 8 as the next digit in the result. 
Result so far: 329635.58
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.

Advancing to step 11:
If we divide 380 by 39, we get 9 and a remainder of 29.
The next digit of our result is 9. 
Result so far: 329635.589
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 12:
39 goes into 290 7 times with a remainder of 17.
The next digit of our result is 7. 
Result so far: 329635.5897
If we take 273 away from 290, we end up 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.

Moving on to step 13:
39 can be fit into 170 4 times, resulting in a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 329635.58974
If we take 156 away from 170, we end up 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.

Advancing to step 14:
140 divided by 39 is 3 with a remainder of 23.
Record the quotient 3 as the next digit in the result. 
Result so far: 329635.589743
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.

Going ahead to step 15:
230 divided by 39 is 5 with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 329635.5897435
The remainder is 35 after subtracting 195 from 230.
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 16:
39 can be fit into 350 8 times, resulting in a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 329635.58974358
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.

Our division results in 329635.58974358 with a remaining 3.8e-08.