389290 divided by 90 
Our goal is to divide 389290 by 90.

On to step 1:
The number 90 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 90

Advancing to step 2:
When dividing 38 by 90, we get 0 with a remainder of 38.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 38 to get 38.
Append the next digit (9) from the dividend to 38 and continue with: 389 / 90

Let's proceed to step 3:
90 can be fit into 389 4 times, resulting in a remainder of 29.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 360 from 389 and we're left with 29.
Grab the next digit (2) from the dividend, add it to 29, then carry on: 292 / 90

On to step 4:
90 goes into 292 3 times with a remainder of 22.
Write down 3 as next digit of the result. 
Result so far: 43.0
The remainder is 22 after subtracting 270 from 292.
Take the next digit (9) from the dividend and append it to 22, then repeat: 229 / 90

Going ahead to step 5:
229 divided by 90 is 2 with a remainder of 49.
The number 2 becomes the next digit in our result. 
Result so far: 432.0
If we take 180 away from 229, we end up with 49.
Grab the next digit (0) from the dividend, add it to 49, then carry on: 490 / 90

Step 6:
If we divide 490 by 90, we get 5 and a remainder of 40.
The next digit of our result is 5. 
Result so far: 4325.0
The remainder is 40 after subtracting 450 from 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 7:
90 can be fit into 400 4 times, resulting in a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 4325.4
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.

Advancing to step 8:
If we divide 400 by 90, we get 4 and a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 4325.44
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 4325.44 and a remainder of 0.04.