903944 divided by 12 
Our goal is to divide 903944 by 12.

Step 1:
If we divide 9 by 12, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 12

On to step 2:
The number 12 fits into 90 7 times, leaving a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we take 84 away from 90, we end up with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 12

On to step 3:
12 goes into 63 5 times with a remainder of 3.
The next digit of our result is 5. 
Result so far: 75.0
If we take 60 away from 63, we end up with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 12

On to step 4:
12 goes into 39 3 times with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 753.0
The remainder is 3 after subtracting 36 from 39.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 12

Step 5:
12 can be fit into 34 2 times, resulting in a remainder of 10.
The next digit of our result is 2. 
Result so far: 7532.0
Subtracting 24 from 34 leaves us with 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 12

On to step 6:
The number 12 fits into 104 8 times, leaving a remainder of 8.
The next digit of our result is 8. 
Result so far: 75328.0
If we subtract 96 from 104, 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.

Going ahead to step 7:
12 can be fit into 80 6 times, resulting in a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 75328.6
If we take 72 away from 80, we end up 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.

Advancing to step 8:
If we divide 80 by 12, we get 6 and a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 75328.66
Deduct 72 from 80 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.

After the division, we end up with 75328.66 and a remainder of 0.008.