18043867 divided by 903 
We want to figure out the number of times 18043867 can be divided by 903.

On to step 1:
If we divide 1 by 903, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 903

Going ahead to step 2:
903 can be fit into 18 0 times, resulting in a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 18 leaves us with 18.
Grab the next digit (0) from the dividend, add it to 18, then carry on: 180 / 903

Advancing to step 3:
When dividing 180 by 903, we get 0 with a remainder of 180.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 180 and we're left with 180.
Grab the next digit (4) from the dividend, add it to 180, then carry on: 1804 / 903

On to step 4:
When dividing 1804 by 903, we get 1 with a remainder of 901.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 903 from 1804, we get 901.
Include the next digit (3) from the dividend after 901, then repeat: 9013 / 903

Going ahead to step 5:
9013 divided by 903 is 9 with a remainder of 886.
The next digit of our result is 9. 
Result so far: 19.0
Subtract 8127 from 9013 to get 886.
Fetch the next digit (8) from the dividend, attach it to 886 and continue: 8868 / 903

Moving on to step 6:
903 can be fit into 8868 9 times, resulting in a remainder of 741.
The next digit of our result is 9. 
Result so far: 199.0
The remainder is 741 after subtracting 8127 from 8868.
Bring next digit (6) of the dividend behind the 741 and repeat the process: 7416 / 903

On to step 7:
903 can be fit into 7416 8 times, resulting in a remainder of 192.
The next digit of our result is 8. 
Result so far: 1998.0
Subtract 7224 from 7416 to get 192.
Include the next digit (7) from the dividend after 192, then repeat: 1927 / 903

Going ahead to step 8:
903 goes into 1927 2 times with a remainder of 121.
The number 2 becomes the next digit in our result. 
Result so far: 19982.0
Subtract 1806 from 1927 to get 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

On to step 9:
If we divide 1210 by 903, we get 1 and a remainder of 307.
Put 1 as the next digit of the answer. 
Result so far: 19982.1
Subtracting 903 from 1210 leaves us with 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

Going ahead to step 10:
When dividing 3070 by 903, we get 3 with a remainder of 361.
The next digit of our result is 3. 
Result so far: 19982.13
If we subtract 2709 from 3070, we get 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Going ahead to step 11:
If we divide 3610 by 903, we get 3 and a remainder of 901.
The number 3 becomes the next digit in our result. 
Result so far: 19982.133
Subtracting 2709 from 3610 leaves us with 901.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9010, and continue the process.

The final outcome is 19982.133, with a leftover of 0.0901.