838191 ÷ 12 
We're looking to find how many times 12 goes into 838191.

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
If we take 0 away from 8, we end up with 8.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 12

On to step 2:
12 can be fit into 83 6 times, resulting in a remainder of 11.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 72 away from 83, we end up with 11.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 12

Advancing to step 3:
When dividing 118 by 12, we get 9 with a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 69.0
Subtracting 108 from 118 leaves us with 10.
Include the next digit (1) from the dividend after 10, then repeat: 101 / 12

Step 4:
12 goes into 101 8 times with a remainder of 5.
Use 8 as the next digit of our solution. 
Result so far: 698.0
If we subtract 96 from 101, we get 5.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 12

On to step 5:
12 can be fit into 59 4 times, resulting in a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 6984.0
If we take 48 away from 59, we end up with 11.
Append the next digit (1) from the dividend to 11 and continue with: 111 / 12

Step 6:
If we divide 111 by 12, we get 9 and a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 69849.0
If we subtract 108 from 111, we get 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:
When dividing 30 by 12, we get 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 69849.2
Subtracting 24 from 30 leaves us with 6.
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 12 fits into 60 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 69849.25
If we subtract 60 from 60, 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.

Going ahead to step 9:
12 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 69849.25
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.

Let's proceed to step 10:
If we divide 0 by 12, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 69849.25
Deduct 0 from 0 and we're left with 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 outcome is 69849.25, with a leftover of 0.0.