Let's divide 66590 by 81
We want to divide 66590 by 81.

Advancing to step 1:
The number 81 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 81

Moving on to step 2:
When dividing 66 by 81, we get 0 with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Take the next digit (5) from the dividend and append it to 66, then repeat: 665 / 81

Advancing to step 3:
The number 81 fits into 665 8 times, leaving a remainder of 17.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 17 after subtracting 648 from 665.
Take the next digit (9) from the dividend and append it to 17, then repeat: 179 / 81

Going ahead to step 4:
81 can be fit into 179 2 times, resulting in a remainder of 17.
Put 2 as the next digit of the answer. 
Result so far: 82.0
If we subtract 162 from 179, we get 17.
Fetch the next digit (0) from the dividend, attach it to 17 and continue: 170 / 81

Let's proceed to step 5:
170 divided by 81 is 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 822.0
The remainder is 8 after subtracting 162 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 6:
The number 81 fits into 80 0 times, leaving a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 822.0
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 7:
When dividing 800 by 81, we get 9 with a remainder of 71.
The next digit of our result is 9. 
Result so far: 822.09
Deduct 729 from 800 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 8:
81 goes into 710 8 times with a remainder of 62.
Use 8 as the next digit of our solution. 
Result so far: 822.098
If we subtract 648 from 710, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 9:
81 can be fit into 620 7 times, resulting in a remainder of 53.
Use 7 as the next digit of our solution. 
Result so far: 822.0987
Subtract 567 from 620 to get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Advancing to step 10:
The number 81 fits into 530 6 times, leaving a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 822.09876
Deduct 486 from 530 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 11:
The number 81 fits into 440 5 times, leaving a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 822.098765
The remainder is 35 after subtracting 405 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 12:
The number 81 fits into 350 4 times, leaving a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 822.0987654
If we subtract 324 from 350, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 13:
The number 81 fits into 260 3 times, leaving a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 822.09876543
If we subtract 243 from 260, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

After the division, we end up with 822.09876543 and a remainder of 1.7e-08.