We look at the division of 12189903 by 728 
Our goal is to divide 12189903 by 728.

On to step 1:
728 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 728

Step 2:
12 divided by 728 is 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 728

On to step 3:
728 can be fit into 121 0 times, resulting in a remainder of 121.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 121 after subtracting 0 from 121.
Grab the next digit (8) from the dividend, add it to 121, then carry on: 1218 / 728

Moving on to step 4:
728 goes into 1218 1 times with a remainder of 490.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 728 from 1218 to get 490.
Grab the next digit (9) from the dividend, add it to 490, then carry on: 4909 / 728

Going ahead to step 5:
If we divide 4909 by 728, we get 6 and a remainder of 541.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we take 4368 away from 4909, we end up with 541.
Take the next digit (9) from the dividend and append it to 541, then repeat: 5419 / 728

Step 6:
728 can be fit into 5419 7 times, resulting in a remainder of 323.
The number 7 becomes the next digit in our result. 
Result so far: 167.0
Subtracting 5096 from 5419 leaves us with 323.
Fetch the next digit (0) from the dividend, attach it to 323 and continue: 3230 / 728

Step 7:
3230 divided by 728 is 4 with a remainder of 318.
The next digit of our result is 4. 
Result so far: 1674.0
Subtracting 2912 from 3230 leaves us with 318.
Take the next digit (3) from the dividend and append it to 318, then repeat: 3183 / 728

Moving on to step 8:
The number 728 fits into 3183 4 times, leaving a remainder of 271.
The next digit of our result is 4. 
Result so far: 16744.0
Subtract 2912 from 3183 to get 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Going ahead to step 9:
When dividing 2710 by 728, we get 3 with a remainder of 526.
Use 3 as the next digit of our solution. 
Result so far: 16744.3
Subtract 2184 from 2710 to get 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

Let's proceed to step 10:
If we divide 5260 by 728, we get 7 and a remainder of 164.
The number 7 becomes the next digit in our result. 
Result so far: 16744.37
The remainder is 164 after subtracting 5096 from 5260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Step 11:
The number 728 fits into 1640 2 times, leaving a remainder of 184.
Record the quotient 2 as the next digit in the result. 
Result so far: 16744.372
Subtracting 1456 from 1640 leaves us with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Let's proceed to step 12:
728 goes into 1840 2 times with a remainder of 384.
The number 2 becomes the next digit in our result. 
Result so far: 16744.3722
If we take 1456 away from 1840, we end up with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

The final outcome is 16744.3722, with a leftover of 0.00384.