We look at the division of 904399 by 12 
We want to figure out the number of times 904399 can be divided by 12.

Step 1:
12 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 12

Moving on to step 2:
12 can be fit into 90 7 times, resulting in a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 84 away from 90, we end up with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 12

On to step 3:
64 divided by 12 is 5 with a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 75.0
Subtracting 60 from 64 leaves us with 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 12

On to step 4:
43 divided by 12 is 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 753.0
If we subtract 36 from 43, we get 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 12

Let's proceed to step 5:
The number 12 fits into 79 6 times, leaving a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 7536.0
If we subtract 72 from 79, we get 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 12

Advancing to step 6:
12 can be fit into 79 6 times, resulting in a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 75366.0
If we subtract 72 from 79, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
70 divided by 12 is 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 75366.5
If we subtract 60 from 70, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
100 divided by 12 is 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 75366.58
If we take 96 away from 100, 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.

Let's proceed to step 9:
If we divide 40 by 12, we get 3 and a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 75366.583
Subtracting 36 from 40 leaves us 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.

Advancing to step 10:
If we divide 40 by 12, we get 3 and a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 75366.5833
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.

The final result is 75366.5833 with a remainder of 4e-05.