We divide 810091 by 28
We want to figure out the number of times 810091 can be divided by 28.

Advancing to step 1:
The number 28 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 28

Advancing to step 2:
28 can be fit into 81 2 times, resulting in a remainder of 25.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 56 away from 81, we end up with 25.
Append the next digit (0) from the dividend to 25 and continue with: 250 / 28

Advancing to step 3:
If we divide 250 by 28, we get 8 and a remainder of 26.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
Subtract 224 from 250 to get 26.
Grab the next digit (0) from the dividend, add it to 26, then carry on: 260 / 28

Moving on to step 4:
The number 28 fits into 260 9 times, leaving a remainder of 8.
Record the quotient 9 as the next digit in the result. 
Result so far: 289.0
The remainder is 8 after subtracting 252 from 260.
Grab the next digit (9) from the dividend, add it to 8, then carry on: 89 / 28

Moving on to step 5:
If we divide 89 by 28, we get 3 and a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 2893.0
Deduct 84 from 89 and we're left with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 28

Going ahead to step 6:
When dividing 51 by 28, we get 1 with a remainder of 23.
The number 1 becomes the next digit in our result. 
Result so far: 28931.0
Subtracting 28 from 51 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 7:
When dividing 230 by 28, we get 8 with a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 28931.8
The remainder is 6 after subtracting 224 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
The number 28 fits into 60 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 28931.82
Deduct 56 from 60 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 9:
If we divide 40 by 28, we get 1 and a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 28931.821
Deduct 28 from 40 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 10:
28 can be fit into 120 4 times, resulting in a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 28931.8214
If we take 112 away from 120, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 11:
The number 28 fits into 80 2 times, leaving a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 28931.82142
Deduct 56 from 80 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
If we divide 240 by 28, we get 8 and a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 28931.821428
Subtracting 224 from 240 leaves us 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.

Moving on to step 13:
160 divided by 28 is 5 with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 28931.8214285
Subtracting 140 from 160 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 14:
28 can be fit into 200 7 times, resulting in a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 28931.82142857
The remainder is 4 after subtracting 196 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

In conclusion, the division gives 28931.82142857 with a balance of 4e-09.