We're dividing 478521 by 90 
Our goal is to divide 478521 by 90.

Moving on to step 1:
When dividing 4 by 90, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (7) from the dividend to 4 and continue with: 47 / 90

Step 2:
The number 90 fits into 47 0 times, leaving a remainder of 47.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 47 after subtracting 0 from 47.
Append the next digit (8) from the dividend to 47 and continue with: 478 / 90

Advancing to step 3:
90 goes into 478 5 times with a remainder of 28.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 450 from 478 and we're left with 28.
Include the next digit (5) from the dividend after 28, then repeat: 285 / 90

Going ahead to step 4:
90 can be fit into 285 3 times, resulting in a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 53.0
Subtract 270 from 285 to get 15.
Append the next digit (2) from the dividend to 15 and continue with: 152 / 90

Let's proceed to step 5:
90 goes into 152 1 times with a remainder of 62.
The next digit of our result is 1. 
Result so far: 531.0
Subtracting 90 from 152 leaves us with 62.
Append the next digit (1) from the dividend to 62 and continue with: 621 / 90

On to step 6:
When dividing 621 by 90, we get 6 with a remainder of 81.
Use 6 as the next digit of our solution. 
Result so far: 5316.0
Deduct 540 from 621 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Let's proceed to step 7:
810 divided by 90 is 9 with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 5316.9
If we subtract 810 from 810, 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.

Advancing to step 8:
90 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5316.9
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.

Step 9:
If we divide 0 by 90, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 5316.9
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.

The quotient of the division is 5316.9, and the remainder is 0.0.