Let's divide 439606 by 90
Our goal is to divide 439606 by 90.

Advancing to step 1:
When dividing 4 by 90, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 90

Step 2:
90 can be fit into 43 0 times, resulting in a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Include the next digit (9) from the dividend after 43, then repeat: 439 / 90

Advancing to step 3:
If we divide 439 by 90, we get 4 and a remainder of 79.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 360 from 439 and we're left with 79.
Take the next digit (6) from the dividend and append it to 79, then repeat: 796 / 90

Moving on to step 4:
The number 90 fits into 796 8 times, leaving a remainder of 76.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
Deduct 720 from 796 and we're left with 76.
Include the next digit (0) from the dividend after 76, then repeat: 760 / 90

On to step 5:
90 goes into 760 8 times with a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 488.0
Deduct 720 from 760 and we're left with 40.
Grab the next digit (6) from the dividend, add it to 40, then carry on: 406 / 90

On to step 6:
When dividing 406 by 90, we get 4 with a remainder of 46.
Put 4 as the next digit of the answer. 
Result so far: 4884.0
If we subtract 360 from 406, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 7:
90 can be fit into 460 5 times, resulting in a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 4884.5
If we take 450 away from 460, we end up 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.

Advancing to step 8:
If we divide 100 by 90, we get 1 and a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 4884.51
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.

Going ahead to step 9:
90 can be fit into 100 1 times, resulting in a remainder of 10.
The next digit of our result is 1. 
Result so far: 4884.511
If we subtract 90 from 100, we 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.

Our division results in 4884.511 with a remaining 0.001.