We're dividing 661539 by 81 
Our goal is to divide 661539 by 81.

On to step 1:
81 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 81

Step 2:
If we divide 66 by 81, we get 0 and a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Grab the next digit (1) from the dividend, add it to 66, then carry on: 661 / 81

Step 3:
When dividing 661 by 81, we get 8 with a remainder of 13.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 648 from 661 and we're left with 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 81

On to step 4:
The number 81 fits into 135 1 times, leaving a remainder of 54.
The number 1 becomes the next digit in our result. 
Result so far: 81.0
Subtracting 81 from 135 leaves us with 54.
Append the next digit (3) from the dividend to 54 and continue with: 543 / 81

On to step 5:
81 can be fit into 543 6 times, resulting in a remainder of 57.
Record the quotient 6 as the next digit in the result. 
Result so far: 816.0
If we take 486 away from 543, we end up with 57.
Take the next digit (9) from the dividend and append it to 57, then repeat: 579 / 81

Moving on to step 6:
If we divide 579 by 81, we get 7 and a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 8167.0
Deduct 567 from 579 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 7:
When dividing 120 by 81, we get 1 with a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 8167.1
If we take 81 away from 120, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 8:
390 divided by 81 is 4 with a remainder of 66.
Record the quotient 4 as the next digit in the result. 
Result so far: 8167.14
Subtract 324 from 390 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 9:
The number 81 fits into 660 8 times, leaving a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 8167.148
Subtracting 648 from 660 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 10:
The number 81 fits into 120 1 times, leaving a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 8167.1481
Deduct 81 from 120 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 11:
When dividing 390 by 81, we get 4 with a remainder of 66.
The next digit of our result is 4. 
Result so far: 8167.14814
If we subtract 324 from 390, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 12:
If we divide 660 by 81, we get 8 and a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 8167.148148
Subtracting 648 from 660 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 13:
When dividing 120 by 81, we get 1 with a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 8167.1481481
Subtracting 81 from 120 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 14:
If we divide 390 by 81, we get 4 and a remainder of 66.
The number 4 becomes the next digit in our result. 
Result so far: 8167.14814814
Subtract 324 from 390 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

After the division, we end up with 8167.14814814 and a remainder of 6.6e-08.