We're dividing 231979 by 90 
Let's see how many times 90 fits into 231979.

On to step 1:
90 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (3) from the dividend after 2, then repeat: 23 / 90

Step 2:
90 goes into 23 0 times with a remainder of 23.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 23 and we're left with 23.
Grab the next digit (1) from the dividend, add it to 23, then carry on: 231 / 90

Moving on to step 3:
90 can be fit into 231 2 times, resulting in a remainder of 51.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 180 from 231 to get 51.
Append the next digit (9) from the dividend to 51 and continue with: 519 / 90

Let's proceed to step 4:
If we divide 519 by 90, we get 5 and a remainder of 69.
Use 5 as the next digit of our solution. 
Result so far: 25.0
If we take 450 away from 519, we end up with 69.
Include the next digit (7) from the dividend after 69, then repeat: 697 / 90

Advancing to step 5:
90 goes into 697 7 times with a remainder of 67.
Put 7 as the next digit of the answer. 
Result so far: 257.0
If we subtract 630 from 697, we get 67.
Include the next digit (9) from the dividend after 67, then repeat: 679 / 90

Going ahead to step 6:
679 divided by 90 is 7 with a remainder of 49.
Use 7 as the next digit of our solution. 
Result so far: 2577.0
If we take 630 away from 679, we end up 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:
If we divide 490 by 90, we get 5 and a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 2577.5
Deduct 450 from 490 and we're left 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.

Moving on to step 8:
When dividing 400 by 90, we get 4 with a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 2577.54
Subtract 360 from 400 to 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.

Going ahead to step 9:
When dividing 400 by 90, we get 4 with a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 2577.544
Subtracting 360 from 400 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.

After the division, we end up with 2577.544 and a remainder of 0.004.