We look at the division of 903451 by 9 
We're looking to find how many times 9 goes into 903451.

Going ahead to step 1:
9 goes into 9 1 times with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 0 after subtracting 9 from 9.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 9

Moving on to step 2:
If we divide 0 by 9, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 0, we end up with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 9

Going ahead to step 3:
3 divided by 9 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 100.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 9

Advancing to step 4:
9 can be fit into 34 3 times, resulting in a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 1003.0
If we subtract 27 from 34, we get 7.
Append the next digit (5) from the dividend to 7 and continue with: 75 / 9

Going ahead to step 5:
9 can be fit into 75 8 times, resulting in a remainder of 3.
Write down 8 as next digit of the result. 
Result so far: 10038.0
The remainder is 3 after subtracting 72 from 75.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 9

Advancing to step 6:
If we divide 31 by 9, we get 3 and a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 100383.0
Deduct 27 from 31 and we're left 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.

On to step 7:
When dividing 40 by 9, we get 4 with a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 100383.4
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.

Let's proceed to step 8:
The number 9 fits into 40 4 times, leaving a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 100383.44
Deduct 36 from 40 and we're left 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.

The quotient of the division is 100383.44, and the remainder is 0.004.