Let's divide 280021 by 81
We're looking to find how many times 81 goes into 280021.

On 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.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 81

Advancing to step 2:
If we divide 28 by 81, we get 0 and a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 28, we get 28.
Fetch the next digit (0) from the dividend, attach it to 28 and continue: 280 / 81

Moving on to step 3:
81 can be fit into 280 3 times, resulting in a remainder of 37.
The next digit of our result is 3. 
Result so far: 3.0
If we take 243 away from 280, we end up with 37.
Include the next digit (0) from the dividend after 37, then repeat: 370 / 81

On to step 4:
When dividing 370 by 81, we get 4 with a remainder of 46.
The next digit of our result is 4. 
Result so far: 34.0
Subtracting 324 from 370 leaves us with 46.
Append the next digit (2) from the dividend to 46 and continue with: 462 / 81

On to step 5:
81 can be fit into 462 5 times, resulting in a remainder of 57.
Use 5 as the next digit of our solution. 
Result so far: 345.0
Subtracting 405 from 462 leaves us with 57.
Grab the next digit (1) from the dividend, add it to 57, then carry on: 571 / 81

Let's proceed to step 6:
If we divide 571 by 81, we get 7 and a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 3457.0
The remainder is 4 after subtracting 567 from 571.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
The number 81 fits into 40 0 times, leaving a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 3457.0
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
81 goes into 400 4 times with a remainder of 76.
Write down 4 as next digit of the result. 
Result so far: 3457.04
Deduct 324 from 400 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 9:
The number 81 fits into 760 9 times, leaving a remainder of 31.
The next digit of our result is 9. 
Result so far: 3457.049
If we subtract 729 from 760, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 10:
81 goes into 310 3 times with a remainder of 67.
Use 3 as the next digit of our solution. 
Result so far: 3457.0493
If we take 243 away from 310, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 11:
The number 81 fits into 670 8 times, leaving a remainder of 22.
Record the quotient 8 as the next digit in the result. 
Result so far: 3457.04938
If we subtract 648 from 670, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 12:
If we divide 220 by 81, we get 2 and a remainder of 58.
Write down 2 as next digit of the result. 
Result so far: 3457.049382
If we subtract 162 from 220, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 13:
81 goes into 580 7 times with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 3457.0493827
Deduct 567 from 580 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 14:
130 divided by 81 is 1 with a remainder of 49.
Record the quotient 1 as the next digit in the result. 
Result so far: 3457.04938271
Subtract 81 from 130 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

The final result is 3457.04938271 with a remainder of 4.9e-08.