664834 ÷ 81 
Our goal is to divide 664834 by 81.

Let's proceed to step 1:
81 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 81

Moving on to step 2:
The number 81 fits into 66 0 times, leaving a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Bring next digit (4) of the dividend behind the 66 and repeat the process: 664 / 81

Advancing to step 3:
81 goes into 664 8 times with a remainder of 16.
The next digit of our result is 8. 
Result so far: 8.0
If we subtract 648 from 664, we get 16.
Append the next digit (8) from the dividend to 16 and continue with: 168 / 81

Advancing to step 4:
When dividing 168 by 81, we get 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
Subtract 162 from 168 to get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 81

Going ahead to step 5:
81 can be fit into 63 0 times, resulting in a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 820.0
The remainder is 63 after subtracting 0 from 63.
Bring next digit (4) of the dividend behind the 63 and repeat the process: 634 / 81

On to step 6:
634 divided by 81 is 7 with a remainder of 67.
The number 7 becomes the next digit in our result. 
Result so far: 8207.0
The remainder is 67 after subtracting 567 from 634.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 7:
The number 81 fits into 670 8 times, leaving a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 8207.8
Subtracting 648 from 670 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 8:
81 goes into 220 2 times with a remainder of 58.
The next digit of our result is 2. 
Result so far: 8207.82
Subtracting 162 from 220 leaves us 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.

Advancing to step 9:
580 divided by 81 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 8207.827
The remainder is 13 after subtracting 567 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 10:
81 goes into 130 1 times with a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 8207.8271
Subtracting 81 from 130 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 11:
81 can be fit into 490 6 times, resulting in a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 8207.82716
Deduct 486 from 490 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 12:
40 divided by 81 is 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 8207.82716
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 13:
If we divide 400 by 81, we get 4 and a remainder of 76.
Record the quotient 4 as the next digit in the result. 
Result so far: 8207.8271604
The remainder is 76 after subtracting 324 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 14:
81 can be fit into 760 9 times, resulting in a remainder of 31.
Use 9 as the next digit of our solution. 
Result so far: 8207.82716049
Deduct 729 from 760 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

The final result is 8207.82716049 with a remainder of 3.1e-08.