We divide 388880 by 90
We want to divide 388880 by 90.

Step 1:
When dividing 3 by 90, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 90

Let's proceed to step 2:
The number 90 fits into 38 0 times, leaving a remainder of 38.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 38 to get 38.
Fetch the next digit (8) from the dividend, attach it to 38 and continue: 388 / 90

On to step 3:
90 can be fit into 388 4 times, resulting in a remainder of 28.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 360 from 388, we get 28.
Fetch the next digit (8) from the dividend, attach it to 28 and continue: 288 / 90

Going ahead to step 4:
If we divide 288 by 90, we get 3 and a remainder of 18.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
Subtracting 270 from 288 leaves us with 18.
Grab the next digit (8) from the dividend, add it to 18, then carry on: 188 / 90

On to step 5:
188 divided by 90 is 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 432.0
If we subtract 180 from 188, we get 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 90

Moving on to step 6:
90 can be fit into 80 0 times, resulting in a remainder of 80.
The next digit of our result is 0. 
Result so far: 4320.0
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 7:
If we divide 800 by 90, we get 8 and a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 4320.8
Subtracting 720 from 800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 8:
When dividing 800 by 90, we get 8 with a remainder of 80.
The next digit of our result is 8. 
Result so far: 4320.88
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Our division results in 4320.88 with a remaining 0.08.