We look at the division of 8536646 by 991 
We want to divide 8536646 by 991.

Step 1:
If we divide 8 by 991, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 991

Step 2:
When dividing 85 by 991, we get 0 with a remainder of 85.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 85 to get 85.
Grab the next digit (3) from the dividend, add it to 85, then carry on: 853 / 991

On to step 3:
If we divide 853 by 991, we get 0 and a remainder of 853.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 853 and we're left with 853.
Bring next digit (6) of the dividend behind the 853 and repeat the process: 8536 / 991

Moving on to step 4:
When dividing 8536 by 991, we get 8 with a remainder of 608.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 608 after subtracting 7928 from 8536.
Bring next digit (6) of the dividend behind the 608 and repeat the process: 6086 / 991

Going ahead to step 5:
991 can be fit into 6086 6 times, resulting in a remainder of 140.
Use 6 as the next digit of our solution. 
Result so far: 86.0
Deduct 5946 from 6086 and we're left with 140.
Bring next digit (4) of the dividend behind the 140 and repeat the process: 1404 / 991

Going ahead to step 6:
When dividing 1404 by 991, we get 1 with a remainder of 413.
Use 1 as the next digit of our solution. 
Result so far: 861.0
Subtract 991 from 1404 to get 413.
Append the next digit (6) from the dividend to 413 and continue with: 4136 / 991

Going ahead to step 7:
The number 991 fits into 4136 4 times, leaving a remainder of 172.
Put 4 as the next digit of the answer. 
Result so far: 8614.0
The remainder is 172 after subtracting 3964 from 4136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Moving on to step 8:
991 goes into 1720 1 times with a remainder of 729.
Write down 1 as next digit of the result. 
Result so far: 8614.1
Subtract 991 from 1720 to get 729.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7290, and continue the process.

On to step 9:
991 can be fit into 7290 7 times, resulting in a remainder of 353.
Write down 7 as next digit of the result. 
Result so far: 8614.17
If we take 6937 away from 7290, we end up with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Moving on to step 10:
991 goes into 3530 3 times with a remainder of 557.
Use 3 as the next digit of our solution. 
Result so far: 8614.173
Deduct 2973 from 3530 and we're left with 557.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5570, and continue the process.

On to step 11:
If we divide 5570 by 991, we get 5 and a remainder of 615.
Record the quotient 5 as the next digit in the result. 
Result so far: 8614.1735
Subtracting 4955 from 5570 leaves us with 615.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6150, and continue the process.

Going ahead to step 12:
6150 divided by 991 is 6 with a remainder of 204.
Write down 6 as next digit of the result. 
Result so far: 8614.17356
The remainder is 204 after subtracting 5946 from 6150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Moving on to step 13:
2040 divided by 991 is 2 with a remainder of 58.
The next digit of our result is 2. 
Result so far: 8614.173562
Deduct 1982 from 2040 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 14:
991 can be fit into 580 0 times, resulting in a remainder of 580.
Record the quotient 0 as the next digit in the result. 
Result so far: 8614.173562
Subtract 0 from 580 to get 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Moving on to step 15:
The number 991 fits into 5800 5 times, leaving a remainder of 845.
The number 5 becomes the next digit in our result. 
Result so far: 8614.17356205
Subtract 4955 from 5800 to get 845.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8450, and continue the process.

Our division results in 8614.17356205 with a remaining 8.45e-07.