We're dividing 830512 by 12 
Our goal is to divide 830512 by 12.

Going ahead to step 1:
If we divide 8 by 12, we get 0 and 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.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 12

Moving on to step 2:
The number 12 fits into 83 6 times, leaving a remainder of 11.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtracting 72 from 83 leaves us with 11.
Take the next digit (0) from the dividend and append it to 11, then repeat: 110 / 12

On to step 3:
110 divided by 12 is 9 with a remainder of 2.
The next digit of our result is 9. 
Result so far: 69.0
If we take 108 away from 110, we end up with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 12

On to step 4:
The number 12 fits into 25 2 times, leaving a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 692.0
If we take 24 away from 25, we end up with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 12

On to step 5:
11 divided by 12 is 0 with a remainder of 11.
The next digit of our result is 0. 
Result so far: 6920.0
The remainder is 11 after subtracting 0 from 11.
Take the next digit (2) from the dividend and append it to 11, then repeat: 112 / 12

Step 6:
If we divide 112 by 12, we get 9 and a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 69209.0
If we subtract 108 from 112, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 69209.3
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 8:
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: 69209.33
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 69209.33 and a remainder of 0.004.