660799 ÷ 81 
Our goal is to divide 660799 by 81.

Step 1:
81 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 81

On to step 2:
The number 81 fits into 66 0 times, leaving 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.
Append the next digit (0) from the dividend to 66 and continue with: 660 / 81

On to step 3:
81 goes into 660 8 times with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 648 from 660 leaves us with 12.
Bring next digit (7) of the dividend behind the 12 and repeat the process: 127 / 81

Going ahead to step 4:
81 can be fit into 127 1 times, resulting in a remainder of 46.
Use 1 as the next digit of our solution. 
Result so far: 81.0
If we take 81 away from 127, we end up with 46.
Include the next digit (9) from the dividend after 46, then repeat: 469 / 81

Moving on to step 5:
81 can be fit into 469 5 times, resulting in a remainder of 64.
Write down 5 as next digit of the result. 
Result so far: 815.0
Subtract 405 from 469 to get 64.
Append the next digit (9) from the dividend to 64 and continue with: 649 / 81

Step 6:
81 goes into 649 8 times with a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 8158.0
Subtract 648 from 649 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
The number 81 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 8158.0
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
81 goes into 100 1 times with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 8158.01
Subtracting 81 from 100 leaves us 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.

Step 9:
81 goes into 190 2 times with a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 8158.012
The remainder is 28 after subtracting 162 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 10:
81 can be fit into 280 3 times, resulting in a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 8158.0123
If we take 243 away from 280, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 11:
81 can be fit into 370 4 times, resulting in a remainder of 46.
Put 4 as the next digit of the answer. 
Result so far: 8158.01234
Subtract 324 from 370 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 12:
If we divide 460 by 81, we get 5 and a remainder of 55.
The next digit of our result is 5. 
Result so far: 8158.012345
Deduct 405 from 460 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 13:
The number 81 fits into 550 6 times, leaving a remainder of 64.
The next digit of our result is 6. 
Result so far: 8158.0123456
If we take 486 away from 550, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 14:
81 can be fit into 640 7 times, resulting in a remainder of 73.
The next digit of our result is 7. 
Result so far: 8158.01234567
If we subtract 567 from 640, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Our division results in 8158.01234567 with a remaining 7.3e-08.