We divide 903409 by 4
We want to figure out the number of times 903409 can be divided by 4.

Going ahead to step 1:
When dividing 9 by 4, we get 2 with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 8 from 9 and we're left with 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 4

On to step 2:
The number 4 fits into 10 2 times, leaving a remainder of 2.
The next digit of our result is 2. 
Result so far: 22.0
Subtracting 8 from 10 leaves us with 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 4

Let's proceed to step 3:
23 divided by 4 is 5 with a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 225.0
Deduct 20 from 23 and we're left with 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 4

Step 4:
The number 4 fits into 34 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 2258.0
Subtracting 32 from 34 leaves us with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 4

Let's proceed to step 5:
4 can be fit into 20 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 22585.0
The remainder is 0 after subtracting 20 from 20.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 4

Going ahead to step 6:
When dividing 9 by 4, we get 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 225852.0
If we subtract 8 from 9, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
When dividing 10 by 4, we get 2 with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 225852.2
Subtract 8 from 10 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
The number 4 fits into 20 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 225852.25
If we take 20 away from 20, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 225852.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
0 divided by 4 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 225852.25
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 225852.25, and the remainder is 0.0.