We're dividing 15991636 by 859 
Let's see how many times 859 fits into 15991636.

Moving on to step 1:
If we divide 1 by 859, we get 0 and 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 / 859

On to step 2:
859 goes into 15 0 times with a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 859

Advancing to step 3:
The number 859 fits into 159 0 times, leaving a remainder of 159.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 159, we end up with 159.
Bring next digit (9) of the dividend behind the 159 and repeat the process: 1599 / 859

On to step 4:
859 goes into 1599 1 times with a remainder of 740.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 859 from 1599 leaves us with 740.
Append the next digit (1) from the dividend to 740 and continue with: 7401 / 859

On to step 5:
859 goes into 7401 8 times with a remainder of 529.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
If we subtract 6872 from 7401, we get 529.
Include the next digit (6) from the dividend after 529, then repeat: 5296 / 859

Step 6:
When dividing 5296 by 859, we get 6 with a remainder of 142.
Put 6 as the next digit of the answer. 
Result so far: 186.0
If we take 5154 away from 5296, we end up with 142.
Bring next digit (3) of the dividend behind the 142 and repeat the process: 1423 / 859

Going ahead to step 7:
When dividing 1423 by 859, we get 1 with a remainder of 564.
Put 1 as the next digit of the answer. 
Result so far: 1861.0
If we subtract 859 from 1423, we get 564.
Append the next digit (6) from the dividend to 564 and continue with: 5646 / 859

Let's proceed to step 8:
859 goes into 5646 6 times with a remainder of 492.
Put 6 as the next digit of the answer. 
Result so far: 18616.0
Subtracting 5154 from 5646 leaves us with 492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

Going ahead to step 9:
859 goes into 4920 5 times with a remainder of 625.
The next digit of our result is 5. 
Result so far: 18616.5
The remainder is 625 after subtracting 4295 from 4920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Advancing to step 10:
859 goes into 6250 7 times with a remainder of 237.
The number 7 becomes the next digit in our result. 
Result so far: 18616.57
Subtracting 6013 from 6250 leaves us with 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

On to step 11:
859 goes into 2370 2 times with a remainder of 652.
Put 2 as the next digit of the answer. 
Result so far: 18616.572
If we subtract 1718 from 2370, we get 652.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6520, and continue the process.

Let's proceed to step 12:
859 can be fit into 6520 7 times, resulting in a remainder of 507.
Write down 7 as next digit of the result. 
Result so far: 18616.5727
Deduct 6013 from 6520 and we're left with 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

On to step 13:
When dividing 5070 by 859, we get 5 with a remainder of 775.
Write down 5 as next digit of the result. 
Result so far: 18616.57275
The remainder is 775 after subtracting 4295 from 5070.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7750, and continue the process.

Step 14:
The number 859 fits into 7750 9 times, leaving a remainder of 19.
The next digit of our result is 9. 
Result so far: 18616.572759
Deduct 7731 from 7750 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 15:
859 can be fit into 190 0 times, resulting in a remainder of 190.
Use 0 as the next digit of our solution. 
Result so far: 18616.572759
Subtract 0 from 190 to get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 16:
When dividing 1900 by 859, we get 2 with a remainder of 182.
The next digit of our result is 2. 
Result so far: 18616.57275902
Subtract 1718 from 1900 to get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

After the division, we end up with 18616.57275902 and a remainder of 1.82e-07.