15807879 ÷ 855 
We're looking to find how many times 855 goes into 15807879.

Step 1:
The number 855 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 855

Moving on to step 2:
If we divide 15 by 855, we get 0 and a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Append the next digit (8) from the dividend to 15 and continue with: 158 / 855

On to step 3:
855 can be fit into 158 0 times, resulting in a remainder of 158.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 158, we end up with 158.
Append the next digit (0) from the dividend to 158 and continue with: 1580 / 855

Moving on to step 4:
When dividing 1580 by 855, we get 1 with a remainder of 725.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 725 after subtracting 855 from 1580.
Bring next digit (7) of the dividend behind the 725 and repeat the process: 7257 / 855

Advancing to step 5:
If we divide 7257 by 855, we get 8 and a remainder of 417.
Put 8 as the next digit of the answer. 
Result so far: 18.0
The remainder is 417 after subtracting 6840 from 7257.
Bring next digit (8) of the dividend behind the 417 and repeat the process: 4178 / 855

On to step 6:
If we divide 4178 by 855, we get 4 and a remainder of 758.
The number 4 becomes the next digit in our result. 
Result so far: 184.0
If we subtract 3420 from 4178, we get 758.
Include the next digit (7) from the dividend after 758, then repeat: 7587 / 855

On to step 7:
855 can be fit into 7587 8 times, resulting in a remainder of 747.
The number 8 becomes the next digit in our result. 
Result so far: 1848.0
The remainder is 747 after subtracting 6840 from 7587.
Fetch the next digit (9) from the dividend, attach it to 747 and continue: 7479 / 855

On to step 8:
The number 855 fits into 7479 8 times, leaving a remainder of 639.
The next digit of our result is 8. 
Result so far: 18488.0
If we take 6840 away from 7479, we end up with 639.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6390, and continue the process.

Advancing to step 9:
855 goes into 6390 7 times with a remainder of 405.
The number 7 becomes the next digit in our result. 
Result so far: 18488.7
Subtracting 5985 from 6390 leaves us with 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Advancing to step 10:
The number 855 fits into 4050 4 times, leaving a remainder of 630.
Put 4 as the next digit of the answer. 
Result so far: 18488.74
If we take 3420 away from 4050, we end up with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Going ahead to step 11:
6300 divided by 855 is 7 with a remainder of 315.
Use 7 as the next digit of our solution. 
Result so far: 18488.747
Subtract 5985 from 6300 to get 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Let's proceed to step 12:
855 goes into 3150 3 times with a remainder of 585.
Put 3 as the next digit of the answer. 
Result so far: 18488.7473
Subtracting 2565 from 3150 leaves us with 585.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

On to step 13:
When dividing 5850 by 855, we get 6 with a remainder of 720.
Write down 6 as next digit of the result. 
Result so far: 18488.74736
The remainder is 720 after subtracting 5130 from 5850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Let's proceed to step 14:
The number 855 fits into 7200 8 times, leaving a remainder of 360.
The number 8 becomes the next digit in our result. 
Result so far: 18488.747368
Deduct 6840 from 7200 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Moving on to step 15:
If we divide 3600 by 855, we get 4 and a remainder of 180.
The number 4 becomes the next digit in our result. 
Result so far: 18488.7473684
If we subtract 3420 from 3600, we get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 16:
When dividing 1800 by 855, we get 2 with a remainder of 90.
Write down 2 as next digit of the result. 
Result so far: 18488.74736842
The remainder is 90 after subtracting 1710 from 1800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Our division results in 18488.74736842 with a remaining 9e-08.