We look at the division of 852121 by 12 
We want to divide 852121 by 12.

Moving on to step 1:
12 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 12

Step 2:
12 goes into 85 7 times with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 84 away from 85, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 12

On to step 3:
If we divide 12 by 12, we get 1 and a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 71.0
Deduct 12 from 12 and we're left with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 12

On to step 4:
The number 12 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 710.0
If we subtract 0 from 1, we get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 12

Advancing 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: 7101.0
If we subtract 12 from 12, we get 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 12

Let's proceed to step 6:
When dividing 1 by 12, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 71010.0
Deduct 0 from 1 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
If we divide 10 by 12, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 71010.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
The number 12 fits into 100 8 times, leaving a remainder of 4.
The next digit of our result is 8. 
Result so far: 71010.08
Deduct 96 from 100 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.

Step 9:
12 can be fit into 40 3 times, resulting in a remainder of 4.
The next digit of our result is 3. 
Result so far: 71010.083
If we take 36 away from 40, we end up 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.

Going ahead to step 10:
12 goes into 40 3 times with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 71010.0833
Deduct 36 from 40 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.

In conclusion, the division gives 71010.0833 with a balance of 4e-05.