We look at the division of 864122 by 12 
We want to figure out the number of times 864122 can be divided by 12.

Advancing to step 1:
When dividing 8 by 12, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 12

Let's proceed to step 2:
If we divide 86 by 12, we get 7 and a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 7.0
Deduct 84 from 86 and we're left with 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 12

Advancing to step 3:
If we divide 24 by 12, we get 2 and a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 72.0
Subtract 24 from 24 to get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 12

On to step 4:
1 divided by 12 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 720.0
If we subtract 0 from 1, we get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 12

Going ahead to step 5:
The number 12 fits into 12 1 times, leaving a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 7201.0
If we subtract 12 from 12, we get 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 12

Going ahead to step 6:
If we divide 2 by 12, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 72010.0
Subtracting 0 from 2 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
12 goes into 20 1 times with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 72010.1
Deduct 12 from 20 and we're left 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.

On to step 8:
If we divide 80 by 12, we get 6 and a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 72010.16
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
The number 12 fits into 80 6 times, leaving a remainder of 8.
The next digit of our result is 6. 
Result so far: 72010.166
Subtract 72 from 80 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 72010.166 with a balance of 0.0008.