Let's divide 12668423 by 688
Let's see how many times 688 fits into 12668423.

Step 1:
The number 688 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
If we take 0 away from 1, we end up with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 688

Advancing to step 2:
When dividing 12 by 688, we get 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Bring next digit (6) of the dividend behind the 12 and repeat the process: 126 / 688

Step 3:
126 divided by 688 is 0 with a remainder of 126.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 126, we end up with 126.
Append the next digit (6) from the dividend to 126 and continue with: 1266 / 688

Step 4:
When dividing 1266 by 688, we get 1 with a remainder of 578.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 688 from 1266 to get 578.
Take the next digit (8) from the dividend and append it to 578, then repeat: 5788 / 688

Moving on to step 5:
If we divide 5788 by 688, we get 8 and a remainder of 284.
The next digit of our result is 8. 
Result so far: 18.0
If we subtract 5504 from 5788, we get 284.
Grab the next digit (4) from the dividend, add it to 284, then carry on: 2844 / 688

On to step 6:
2844 divided by 688 is 4 with a remainder of 92.
Put 4 as the next digit of the answer. 
Result so far: 184.0
The remainder is 92 after subtracting 2752 from 2844.
Include the next digit (2) from the dividend after 92, then repeat: 922 / 688

Moving on to step 7:
688 goes into 922 1 times with a remainder of 234.
Put 1 as the next digit of the answer. 
Result so far: 1841.0
If we take 688 away from 922, we end up with 234.
Bring next digit (3) of the dividend behind the 234 and repeat the process: 2343 / 688

Going ahead to step 8:
When dividing 2343 by 688, we get 3 with a remainder of 279.
Write down 3 as next digit of the result. 
Result so far: 18413.0
Deduct 2064 from 2343 and we're left with 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Step 9:
When dividing 2790 by 688, we get 4 with a remainder of 38.
The next digit of our result is 4. 
Result so far: 18413.4
Subtract 2752 from 2790 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 10:
688 goes into 380 0 times with a remainder of 380.
The next digit of our result is 0. 
Result so far: 18413.4
Subtract 0 from 380 to get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Advancing to step 11:
If we divide 3800 by 688, we get 5 and a remainder of 360.
Record the quotient 5 as the next digit in the result. 
Result so far: 18413.405
Subtracting 3440 from 3800 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

On to step 12:
688 can be fit into 3600 5 times, resulting in a remainder of 160.
Record the quotient 5 as the next digit in the result. 
Result so far: 18413.4055
If we subtract 3440 from 3600, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Our division results in 18413.4055 with a remaining 0.0016.