We divide 210903 by 18
We want to divide 210903 by 18.

Let's proceed to step 1:
If we divide 2 by 18, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 18

Let's proceed to step 2:
When dividing 21 by 18, we get 1 with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 18 from 21 and we're left with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 18

Step 3:
18 goes into 30 1 times with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
The remainder is 12 after subtracting 18 from 30.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 18

On to step 4:
18 can be fit into 129 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 117.0
Subtracting 126 from 129 leaves us with 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 18

Advancing to step 5:
30 divided by 18 is 1 with a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 1171.0
If we subtract 18 from 30, we get 12.
Bring next digit (3) of the dividend behind the 12 and repeat the process: 123 / 18

Let's proceed to step 6:
18 goes into 123 6 times with a remainder of 15.
Write down 6 as next digit of the result. 
Result so far: 11716.0
Subtract 108 from 123 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 7:
18 can be fit into 150 8 times, resulting in a remainder of 6.
The next digit of our result is 8. 
Result so far: 11716.8
Deduct 144 from 150 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
60 divided by 18 is 3 with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 11716.83
Subtract 54 from 60 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 9:
18 goes into 60 3 times with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 11716.833
If we take 54 away from 60, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 11716.833, with a leftover of 0.0006.