We divide 285631 by 81
We're looking to find how many times 81 goes into 285631.

Going ahead to step 1:
2 divided by 81 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 81

On to step 2:
When dividing 28 by 81, we get 0 with a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 28 after subtracting 0 from 28.
Include the next digit (5) from the dividend after 28, then repeat: 285 / 81

Moving on to step 3:
285 divided by 81 is 3 with a remainder of 42.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 42 after subtracting 243 from 285.
Take the next digit (6) from the dividend and append it to 42, then repeat: 426 / 81

Going ahead to step 4:
426 divided by 81 is 5 with a remainder of 21.
Use 5 as the next digit of our solution. 
Result so far: 35.0
If we subtract 405 from 426, we get 21.
Fetch the next digit (3) from the dividend, attach it to 21 and continue: 213 / 81

Step 5:
213 divided by 81 is 2 with a remainder of 51.
Write down 2 as next digit of the result. 
Result so far: 352.0
If we subtract 162 from 213, we get 51.
Include the next digit (1) from the dividend after 51, then repeat: 511 / 81

Let's proceed to step 6:
81 can be fit into 511 6 times, resulting in a remainder of 25.
Put 6 as the next digit of the answer. 
Result so far: 3526.0
Deduct 486 from 511 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 7:
The number 81 fits into 250 3 times, leaving a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 3526.3
If we subtract 243 from 250, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 8:
If we divide 70 by 81, we get 0 and a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 3526.3
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 9:
81 can be fit into 700 8 times, resulting in a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 3526.308
If we subtract 648 from 700, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 10:
If we divide 520 by 81, we get 6 and a remainder of 34.
The next digit of our result is 6. 
Result so far: 3526.3086
If we take 486 away from 520, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 11:
If we divide 340 by 81, we get 4 and a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 3526.30864
Deduct 324 from 340 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 12:
81 can be fit into 160 1 times, resulting in a remainder of 79.
Put 1 as the next digit of the answer. 
Result so far: 3526.308641
Deduct 81 from 160 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 13:
When dividing 790 by 81, we get 9 with a remainder of 61.
Write down 9 as next digit of the result. 
Result so far: 3526.3086419
Subtract 729 from 790 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 14:
610 divided by 81 is 7 with a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 3526.30864197
If we subtract 567 from 610, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Our division results in 3526.30864197 with a remaining 4.3e-08.