We look at the division of 459309 by 90 
We want to figure out the number of times 459309 can be divided by 90.

Going ahead to step 1:
If we divide 4 by 90, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 90

Let's proceed to step 2:
90 can be fit into 45 0 times, resulting in a remainder of 45.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Include the next digit (9) from the dividend after 45, then repeat: 459 / 90

Step 3:
If we divide 459 by 90, we get 5 and a remainder of 9.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 450 from 459 and we're left with 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 90

Step 4:
93 divided by 90 is 1 with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 51.0
The remainder is 3 after subtracting 90 from 93.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 90

Moving on to step 5:
When dividing 30 by 90, we get 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 510.0
The remainder is 30 after subtracting 0 from 30.
Grab the next digit (9) from the dividend, add it to 30, then carry on: 309 / 90

Going ahead to step 6:
90 can be fit into 309 3 times, resulting in a remainder of 39.
Put 3 as the next digit of the answer. 
Result so far: 5103.0
Deduct 270 from 309 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 7:
The number 90 fits into 390 4 times, leaving a remainder of 30.
Record the quotient 4 as the next digit in the result. 
Result so far: 5103.4
The remainder is 30 after subtracting 360 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
90 can be fit into 300 3 times, resulting in a remainder of 30.
The next digit of our result is 3. 
Result so far: 5103.43
Subtract 270 from 300 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
90 goes into 300 3 times with a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 5103.433
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 5103.433 with a remaining 0.003.