12810552 ÷ 669 
We want to divide 12810552 by 669.

On to step 1:
The number 669 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 669

Advancing to step 2:
669 goes into 12 0 times with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 669

Step 3:
669 goes into 128 0 times with a remainder of 128.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 128 after subtracting 0 from 128.
Take the next digit (1) from the dividend and append it to 128, then repeat: 1281 / 669

Advancing to step 4:
669 goes into 1281 1 times with a remainder of 612.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 669 away from 1281, we end up with 612.
Grab the next digit (0) from the dividend, add it to 612, then carry on: 6120 / 669

Advancing to step 5:
When dividing 6120 by 669, we get 9 with a remainder of 99.
The next digit of our result is 9. 
Result so far: 19.0
If we take 6021 away from 6120, we end up with 99.
Take the next digit (5) from the dividend and append it to 99, then repeat: 995 / 669

Moving on to step 6:
The number 669 fits into 995 1 times, leaving a remainder of 326.
Write down 1 as next digit of the result. 
Result so far: 191.0
If we take 669 away from 995, we end up with 326.
Bring next digit (5) of the dividend behind the 326 and repeat the process: 3265 / 669

Going ahead to step 7:
The number 669 fits into 3265 4 times, leaving a remainder of 589.
Put 4 as the next digit of the answer. 
Result so far: 1914.0
Subtract 2676 from 3265 to get 589.
Bring next digit (2) of the dividend behind the 589 and repeat the process: 5892 / 669

On to step 8:
5892 divided by 669 is 8 with a remainder of 540.
Record the quotient 8 as the next digit in the result. 
Result so far: 19148.0
The remainder is 540 after subtracting 5352 from 5892.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Moving on to step 9:
669 can be fit into 5400 8 times, resulting in a remainder of 48.
Record the quotient 8 as the next digit in the result. 
Result so far: 19148.8
If we subtract 5352 from 5400, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 10:
If we divide 480 by 669, we get 0 and a remainder of 480.
The next digit of our result is 0. 
Result so far: 19148.8
If we take 0 away from 480, we end up with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

On to step 11:
669 can be fit into 4800 7 times, resulting in a remainder of 117.
Record the quotient 7 as the next digit in the result. 
Result so far: 19148.807
If we take 4683 away from 4800, we end up with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Let's proceed to step 12:
The number 669 fits into 1170 1 times, leaving a remainder of 501.
The number 1 becomes the next digit in our result. 
Result so far: 19148.8071
Subtracting 669 from 1170 leaves us with 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

Moving on to step 13:
The number 669 fits into 5010 7 times, leaving a remainder of 327.
Record the quotient 7 as the next digit in the result. 
Result so far: 19148.80717
Subtract 4683 from 5010 to get 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

Let's proceed to step 14:
When dividing 3270 by 669, we get 4 with a remainder of 594.
The next digit of our result is 4. 
Result so far: 19148.807174
Deduct 2676 from 3270 and we're left with 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Advancing to step 15:
669 goes into 5940 8 times with a remainder of 588.
Record the quotient 8 as the next digit in the result. 
Result so far: 19148.8071748
Subtracting 5352 from 5940 leaves us with 588.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5880, and continue the process.

On to step 16:
When dividing 5880 by 669, we get 8 with a remainder of 528.
The number 8 becomes the next digit in our result. 
Result so far: 19148.80717488
Subtracting 5352 from 5880 leaves us with 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

The final result is 19148.80717488 with a remainder of 5.28e-07.