We look at the division of 23978579 by 209 
Let's see how many times 209 fits into 23978579.

Advancing to step 1:
209 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 209

On to step 2:
209 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
If we subtract 0 from 23, we get 23.
Include the next digit (9) from the dividend after 23, then repeat: 239 / 209

On to step 3:
If we divide 239 by 209, we get 1 and a remainder of 30.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 209 from 239 and we're left with 30.
Bring next digit (7) of the dividend behind the 30 and repeat the process: 307 / 209

On to step 4:
If we divide 307 by 209, we get 1 and a remainder of 98.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtracting 209 from 307 leaves us with 98.
Bring next digit (8) of the dividend behind the 98 and repeat the process: 988 / 209

Going ahead to step 5:
988 divided by 209 is 4 with a remainder of 152.
The next digit of our result is 4. 
Result so far: 114.0
Subtract 836 from 988 to get 152.
Take the next digit (5) from the dividend and append it to 152, then repeat: 1525 / 209

On to step 6:
209 can be fit into 1525 7 times, resulting in a remainder of 62.
The next digit of our result is 7. 
Result so far: 1147.0
If we subtract 1463 from 1525, we get 62.
Take the next digit (7) from the dividend and append it to 62, then repeat: 627 / 209

Advancing to step 7:
If we divide 627 by 209, we get 3 and a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 11473.0
Subtract 627 from 627 to get 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 209

Going ahead to step 8:
The number 209 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 114730.0
If we subtract 0 from 9, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 9:
When dividing 90 by 209, we get 0 with a remainder of 90.
The next digit of our result is 0. 
Result so far: 114730.0
The remainder is 90 after subtracting 0 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 10:
When dividing 900 by 209, we get 4 with a remainder of 64.
Write down 4 as next digit of the result. 
Result so far: 114730.04
Subtracting 836 from 900 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 11:
The number 209 fits into 640 3 times, leaving a remainder of 13.
The number 3 becomes the next digit in our result. 
Result so far: 114730.043
The remainder is 13 after subtracting 627 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 12:
The number 209 fits into 130 0 times, leaving a remainder of 130.
Put 0 as the next digit of the answer. 
Result so far: 114730.043
Subtracting 0 from 130 leaves us with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 13:
If we divide 1300 by 209, we get 6 and a remainder of 46.
Write down 6 as next digit of the result. 
Result so far: 114730.04306
Subtract 1254 from 1300 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 14:
If we divide 460 by 209, we get 2 and a remainder of 42.
The number 2 becomes the next digit in our result. 
Result so far: 114730.043062
If we subtract 418 from 460, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 15:
420 divided by 209 is 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 114730.0430622
If we take 418 away from 420, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

After the division, we end up with 114730.0430622 and a remainder of 2e-08.