Let's divide 86720143 by 669
We're looking to find how many times 669 goes into 86720143.

Let's proceed to step 1:
669 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 669

On to step 2:
86 divided by 669 is 0 with a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Fetch the next digit (7) from the dividend, attach it to 86 and continue: 867 / 669

Let's proceed to step 3:
669 goes into 867 1 times with a remainder of 198.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 669 from 867 and we're left with 198.
Take the next digit (2) from the dividend and append it to 198, then repeat: 1982 / 669

Moving on to step 4:
When dividing 1982 by 669, we get 2 with a remainder of 644.
The next digit of our result is 2. 
Result so far: 12.0
Deduct 1338 from 1982 and we're left with 644.
Fetch the next digit (0) from the dividend, attach it to 644 and continue: 6440 / 669

Let's proceed to step 5:
When dividing 6440 by 669, we get 9 with a remainder of 419.
The next digit of our result is 9. 
Result so far: 129.0
If we take 6021 away from 6440, we end up with 419.
Grab the next digit (1) from the dividend, add it to 419, then carry on: 4191 / 669

Moving on to step 6:
When dividing 4191 by 669, we get 6 with a remainder of 177.
Put 6 as the next digit of the answer. 
Result so far: 1296.0
If we take 4014 away from 4191, we end up with 177.
Include the next digit (4) from the dividend after 177, then repeat: 1774 / 669

On to step 7:
1774 divided by 669 is 2 with a remainder of 436.
The number 2 becomes the next digit in our result. 
Result so far: 12962.0
Subtract 1338 from 1774 to get 436.
Append the next digit (3) from the dividend to 436 and continue with: 4363 / 669

On to step 8:
When dividing 4363 by 669, we get 6 with a remainder of 349.
Put 6 as the next digit of the answer. 
Result so far: 129626.0
Deduct 4014 from 4363 and we're left with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Moving on to step 9:
669 goes into 3490 5 times with a remainder of 145.
The number 5 becomes the next digit in our result. 
Result so far: 129626.5
Subtract 3345 from 3490 to get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Let's proceed to step 10:
If we divide 1450 by 669, we get 2 and a remainder of 112.
The number 2 becomes the next digit in our result. 
Result so far: 129626.52
If we take 1338 away from 1450, we end up with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Advancing to step 11:
The number 669 fits into 1120 1 times, leaving a remainder of 451.
Use 1 as the next digit of our solution. 
Result so far: 129626.521
If we subtract 669 from 1120, we get 451.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

On to step 12:
The number 669 fits into 4510 6 times, leaving a remainder of 496.
The number 6 becomes the next digit in our result. 
Result so far: 129626.5216
Subtracting 4014 from 4510 leaves us with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Moving on to step 13:
If we divide 4960 by 669, we get 7 and a remainder of 277.
Record the quotient 7 as the next digit in the result. 
Result so far: 129626.52167
Subtracting 4683 from 4960 leaves us with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Moving on to step 14:
The number 669 fits into 2770 4 times, leaving a remainder of 94.
The number 4 becomes the next digit in our result. 
Result so far: 129626.521674
Deduct 2676 from 2770 and we're left with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Moving on to step 15:
669 can be fit into 940 1 times, resulting in a remainder of 271.
The next digit of our result is 1. 
Result so far: 129626.5216741
The remainder is 271 after subtracting 669 from 940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Going ahead to step 16:
2710 divided by 669 is 4 with a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 129626.52167414
If we subtract 2676 from 2710, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

In conclusion, the division gives 129626.52167414 with a balance of 3.4e-08.