Let's divide 138823 by 90
Our goal is to divide 138823 by 90.

Moving on to step 1:
90 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 90

Moving on to step 2:
13 divided by 90 is 0 with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 90

On to step 3:
When dividing 138 by 90, we get 1 with a remainder of 48.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 90 from 138 and we're left with 48.
Include the next digit (8) from the dividend after 48, then repeat: 488 / 90

Let's proceed to step 4:
90 can be fit into 488 5 times, resulting in a remainder of 38.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
The remainder is 38 after subtracting 450 from 488.
Grab the next digit (2) from the dividend, add it to 38, then carry on: 382 / 90

On to step 5:
90 can be fit into 382 4 times, resulting in a remainder of 22.
Write down 4 as next digit of the result. 
Result so far: 154.0
If we subtract 360 from 382, we get 22.
Append the next digit (3) from the dividend to 22 and continue with: 223 / 90

Advancing to step 6:
If we divide 223 by 90, we get 2 and a remainder of 43.
Record the quotient 2 as the next digit in the result. 
Result so far: 1542.0
The remainder is 43 after subtracting 180 from 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 7:
When dividing 430 by 90, we get 4 with a remainder of 70.
The number 4 becomes the next digit in our result. 
Result so far: 1542.4
If we take 360 away from 430, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 8:
90 can be fit into 700 7 times, resulting in a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 1542.47
Subtracting 630 from 700 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 9:
If we divide 700 by 90, we get 7 and a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 1542.477
If we subtract 630 from 700, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 1542.477, and the remainder is 0.007.