We're dividing 12156017 by 855 
Let's see how many times 855 fits into 12156017.

Advancing to step 1:
1 divided by 855 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 855

Moving on to step 2:
When dividing 12 by 855, we get 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 855

Moving on to step 3:
121 divided by 855 is 0 with a remainder of 121.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 121, we end up with 121.
Fetch the next digit (5) from the dividend, attach it to 121 and continue: 1215 / 855

On to step 4:
855 goes into 1215 1 times with a remainder of 360.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 855 from 1215 to get 360.
Append the next digit (6) from the dividend to 360 and continue with: 3606 / 855

On to step 5:
3606 divided by 855 is 4 with a remainder of 186.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtract 3420 from 3606 to get 186.
Take the next digit (0) from the dividend and append it to 186, then repeat: 1860 / 855

Step 6:
The number 855 fits into 1860 2 times, leaving a remainder of 150.
The number 2 becomes the next digit in our result. 
Result so far: 142.0
If we take 1710 away from 1860, we end up with 150.
Take the next digit (1) from the dividend and append it to 150, then repeat: 1501 / 855

Advancing to step 7:
1501 divided by 855 is 1 with a remainder of 646.
Use 1 as the next digit of our solution. 
Result so far: 1421.0
If we take 855 away from 1501, we end up with 646.
Grab the next digit (7) from the dividend, add it to 646, then carry on: 6467 / 855

Advancing to step 8:
855 goes into 6467 7 times with a remainder of 482.
Use 7 as the next digit of our solution. 
Result so far: 14217.0
The remainder is 482 after subtracting 5985 from 6467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

Going ahead to step 9:
855 goes into 4820 5 times with a remainder of 545.
The next digit of our result is 5. 
Result so far: 14217.5
If we take 4275 away from 4820, we end up with 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Going ahead to step 10:
If we divide 5450 by 855, we get 6 and a remainder of 320.
Write down 6 as next digit of the result. 
Result so far: 14217.56
Deduct 5130 from 5450 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 11:
855 can be fit into 3200 3 times, resulting in a remainder of 635.
Use 3 as the next digit of our solution. 
Result so far: 14217.563
Subtracting 2565 from 3200 leaves us with 635.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6350, and continue the process.

Advancing to step 12:
6350 divided by 855 is 7 with a remainder of 365.
The number 7 becomes the next digit in our result. 
Result so far: 14217.5637
Deduct 5985 from 6350 and we're left with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Moving on to step 13:
When dividing 3650 by 855, we get 4 with a remainder of 230.
Put 4 as the next digit of the answer. 
Result so far: 14217.56374
If we take 3420 away from 3650, we end up with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Step 14:
2300 divided by 855 is 2 with a remainder of 590.
The next digit of our result is 2. 
Result so far: 14217.563742
If we take 1710 away from 2300, we end up with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Going ahead to step 15:
The number 855 fits into 5900 6 times, leaving a remainder of 770.
Write down 6 as next digit of the result. 
Result so far: 14217.5637426
Subtracting 5130 from 5900 leaves us with 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

Moving on to step 16:
The number 855 fits into 7700 9 times, leaving a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 14217.56374269
Subtract 7695 from 7700 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Our division results in 14217.56374269 with a remaining 5e-09.