We're dividing 812091 by 12 
Our goal is to divide 812091 by 12.

Step 1:
8 divided by 12 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 12

Advancing to step 2:
12 goes into 81 6 times with a remainder of 9.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 9 after subtracting 72 from 81.
Append the next digit (2) from the dividend to 9 and continue with: 92 / 12

Going ahead to step 3:
12 can be fit into 92 7 times, resulting in a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 67.0
If we subtract 84 from 92, we get 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 12

On to step 4:
12 goes into 80 6 times with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 676.0
Subtract 72 from 80 to get 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 12

Step 5:
12 goes into 89 7 times with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 6767.0
If we subtract 84 from 89, we get 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 12

Moving on to step 6:
12 goes into 51 4 times with a remainder of 3.
Record the quotient 4 as the next digit in the result. 
Result so far: 67674.0
Deduct 48 from 51 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
12 can be fit into 30 2 times, resulting in a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 67674.2
The remainder is 6 after subtracting 24 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
If we divide 60 by 12, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 67674.25
The remainder is 0 after subtracting 60 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
12 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 67674.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
The number 12 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 67674.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 67674.25 with a remainder of 0.0.