Let's divide 438889 by 90
We want to divide 438889 by 90.

On to step 1:
The number 90 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 90

Going ahead to step 2:
90 goes into 43 0 times with a remainder of 43.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 43, we get 43.
Bring next digit (8) of the dividend behind the 43 and repeat the process: 438 / 90

On to step 3:
438 divided by 90 is 4 with a remainder of 78.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 360 from 438 and we're left with 78.
Grab the next digit (8) from the dividend, add it to 78, then carry on: 788 / 90

Going ahead to step 4:
90 goes into 788 8 times with a remainder of 68.
Put 8 as the next digit of the answer. 
Result so far: 48.0
If we subtract 720 from 788, we get 68.
Fetch the next digit (8) from the dividend, attach it to 68 and continue: 688 / 90

Step 5:
When dividing 688 by 90, we get 7 with a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 487.0
Subtract 630 from 688 to get 58.
Append the next digit (9) from the dividend to 58 and continue with: 589 / 90

Moving on to step 6:
If we divide 589 by 90, we get 6 and a remainder of 49.
The number 6 becomes the next digit in our result. 
Result so far: 4876.0
Subtracting 540 from 589 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 7:
90 goes into 490 5 times with a remainder of 40.
Use 5 as the next digit of our solution. 
Result so far: 4876.5
Subtracting 450 from 490 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 8:
90 can be fit into 400 4 times, resulting in a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 4876.54
If we take 360 away from 400, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
When dividing 400 by 90, we get 4 with a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 4876.544
If we subtract 360 from 400, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Our division results in 4876.544 with a remaining 0.004.