129678 divided by 23 
Let's see how many times 23 fits into 129678.

Moving on to step 1:
The number 23 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 23

Moving on to step 2:
When dividing 12 by 23, we get 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 23

Let's proceed to step 3:
When dividing 129 by 23, we get 5 with a remainder of 14.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 115 from 129 to get 14.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 23

Going ahead to step 4:
146 divided by 23 is 6 with a remainder of 8.
The next digit of our result is 6. 
Result so far: 56.0
Subtracting 138 from 146 leaves us with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 23

Let's proceed to step 5:
23 can be fit into 87 3 times, resulting in a remainder of 18.
Use 3 as the next digit of our solution. 
Result so far: 563.0
The remainder is 18 after subtracting 69 from 87.
Grab the next digit (8) from the dividend, add it to 18, then carry on: 188 / 23

On to step 6:
If we divide 188 by 23, we get 8 and a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 5638.0
The remainder is 4 after subtracting 184 from 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
40 divided by 23 is 1 with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 5638.1
The remainder is 17 after subtracting 23 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 8:
170 divided by 23 is 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 5638.17
Subtracting 161 from 170 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 9:
When dividing 90 by 23, we get 3 with a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 5638.173
The remainder is 21 after subtracting 69 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 10:
210 divided by 23 is 9 with a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 5638.1739
Subtracting 207 from 210 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 11:
If we divide 30 by 23, we get 1 and a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 5638.17391
If we take 23 away from 30, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 12:
23 can be fit into 70 3 times, resulting in a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 5638.173913
Deduct 69 from 70 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 13:
If we divide 10 by 23, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 5638.173913
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 14:
100 divided by 23 is 4 with a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 5638.17391304
Subtracting 92 from 100 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 5638.17391304, with a leftover of 8e-09.