Let's divide 13209143 by 661
We're looking to find how many times 661 goes into 13209143.

On to step 1:
The number 661 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
Subtract 0 from 1 to get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 661

On to step 2:
661 goes into 13 0 times with a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Append the next digit (2) from the dividend to 13 and continue with: 132 / 661

On to step 3:
661 can be fit into 132 0 times, resulting in a remainder of 132.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 132 after subtracting 0 from 132.
Grab the next digit (0) from the dividend, add it to 132, then carry on: 1320 / 661

Going ahead to step 4:
The number 661 fits into 1320 1 times, leaving a remainder of 659.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 661 from 1320 to get 659.
Include the next digit (9) from the dividend after 659, then repeat: 6599 / 661

Step 5:
661 can be fit into 6599 9 times, resulting in a remainder of 650.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtracting 5949 from 6599 leaves us with 650.
Include the next digit (1) from the dividend after 650, then repeat: 6501 / 661

Moving on to step 6:
6501 divided by 661 is 9 with a remainder of 552.
Put 9 as the next digit of the answer. 
Result so far: 199.0
If we subtract 5949 from 6501, we get 552.
Include the next digit (4) from the dividend after 552, then repeat: 5524 / 661

Going ahead to step 7:
5524 divided by 661 is 8 with a remainder of 236.
Put 8 as the next digit of the answer. 
Result so far: 1998.0
Subtract 5288 from 5524 to get 236.
Bring next digit (3) of the dividend behind the 236 and repeat the process: 2363 / 661

Advancing to step 8:
If we divide 2363 by 661, we get 3 and a remainder of 380.
The next digit of our result is 3. 
Result so far: 19983.0
If we subtract 1983 from 2363, we 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.

Step 9:
661 can be fit into 3800 5 times, resulting in a remainder of 495.
The next digit of our result is 5. 
Result so far: 19983.5
Subtracting 3305 from 3800 leaves us with 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Step 10:
If we divide 4950 by 661, we get 7 and a remainder of 323.
Write down 7 as next digit of the result. 
Result so far: 19983.57
Subtract 4627 from 4950 to get 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

Going ahead to step 11:
If we divide 3230 by 661, we get 4 and a remainder of 586.
Put 4 as the next digit of the answer. 
Result so far: 19983.574
Subtract 2644 from 3230 to get 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

Going ahead to step 12:
The number 661 fits into 5860 8 times, leaving a remainder of 572.
Put 8 as the next digit of the answer. 
Result so far: 19983.5748
The remainder is 572 after subtracting 5288 from 5860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Advancing to step 13:
The number 661 fits into 5720 8 times, leaving a remainder of 432.
Put 8 as the next digit of the answer. 
Result so far: 19983.57488
The remainder is 432 after subtracting 5288 from 5720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

In conclusion, the division gives 19983.57488 with a balance of 0.000432.