We're dividing 604459 by 90 
Let's see how many times 90 fits into 604459.

Step 1:
90 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 90

On to step 2:
60 divided by 90 is 0 with a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 60, we end up with 60.
Bring next digit (4) of the dividend behind the 60 and repeat the process: 604 / 90

Advancing to step 3:
604 divided by 90 is 6 with a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Deduct 540 from 604 and we're left with 64.
Bring next digit (4) of the dividend behind the 64 and repeat the process: 644 / 90

Going ahead to step 4:
The number 90 fits into 644 7 times, leaving a remainder of 14.
The number 7 becomes the next digit in our result. 
Result so far: 67.0
If we subtract 630 from 644, we get 14.
Include the next digit (5) from the dividend after 14, then repeat: 145 / 90

On to step 5:
The number 90 fits into 145 1 times, leaving a remainder of 55.
The next digit of our result is 1. 
Result so far: 671.0
If we subtract 90 from 145, we get 55.
Take the next digit (9) from the dividend and append it to 55, then repeat: 559 / 90

Let's proceed to step 6:
90 can be fit into 559 6 times, resulting in a remainder of 19.
Write down 6 as next digit of the result. 
Result so far: 6716.0
Subtract 540 from 559 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 7:
90 goes into 190 2 times with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 6716.2
Subtract 180 from 190 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
If we divide 100 by 90, we get 1 and a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 6716.21
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
100 divided by 90 is 1 with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 6716.211
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 6716.211 with a remainder of 0.001.