82686099 ÷ 646 
We want to divide 82686099 by 646.

Let's proceed to step 1:
646 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 646

Going ahead to step 2:
When dividing 82 by 646, we get 0 with a remainder of 82.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 82, we get 82.
Grab the next digit (6) from the dividend, add it to 82, then carry on: 826 / 646

Step 3:
646 goes into 826 1 times with a remainder of 180.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 646 from 826 to get 180.
Include the next digit (8) from the dividend after 180, then repeat: 1808 / 646

Let's proceed to step 4:
The number 646 fits into 1808 2 times, leaving a remainder of 516.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtract 1292 from 1808 to get 516.
Take the next digit (6) from the dividend and append it to 516, then repeat: 5166 / 646

Let's proceed to step 5:
646 goes into 5166 7 times with a remainder of 644.
Use 7 as the next digit of our solution. 
Result so far: 127.0
If we subtract 4522 from 5166, we get 644.
Grab the next digit (0) from the dividend, add it to 644, then carry on: 6440 / 646

Step 6:
646 can be fit into 6440 9 times, resulting in a remainder of 626.
Use 9 as the next digit of our solution. 
Result so far: 1279.0
If we take 5814 away from 6440, we end up with 626.
Include the next digit (9) from the dividend after 626, then repeat: 6269 / 646

Advancing to step 7:
6269 divided by 646 is 9 with a remainder of 455.
Write down 9 as next digit of the result. 
Result so far: 12799.0
Subtract 5814 from 6269 to get 455.
Grab the next digit (9) from the dividend, add it to 455, then carry on: 4559 / 646

Advancing to step 8:
646 goes into 4559 7 times with a remainder of 37.
Put 7 as the next digit of the answer. 
Result so far: 127997.0
If we take 4522 away from 4559, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 9:
When dividing 370 by 646, we get 0 with a remainder of 370.
The number 0 becomes the next digit in our result. 
Result so far: 127997.0
Subtracting 0 from 370 leaves us with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Step 10:
646 goes into 3700 5 times with a remainder of 470.
Record the quotient 5 as the next digit in the result. 
Result so far: 127997.05
Deduct 3230 from 3700 and we're left with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Going ahead to step 11:
The number 646 fits into 4700 7 times, leaving a remainder of 178.
Put 7 as the next digit of the answer. 
Result so far: 127997.057
Subtracting 4522 from 4700 leaves us with 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Step 12:
646 goes into 1780 2 times with a remainder of 488.
Write down 2 as next digit of the result. 
Result so far: 127997.0572
If we subtract 1292 from 1780, we get 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Let's proceed to step 13:
When dividing 4880 by 646, we get 7 with a remainder of 358.
The number 7 becomes the next digit in our result. 
Result so far: 127997.05727
The remainder is 358 after subtracting 4522 from 4880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Moving on to step 14:
646 goes into 3580 5 times with a remainder of 350.
The next digit of our result is 5. 
Result so far: 127997.057275
The remainder is 350 after subtracting 3230 from 3580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

On to step 15:
646 goes into 3500 5 times with a remainder of 270.
The number 5 becomes the next digit in our result. 
Result so far: 127997.0572755
The remainder is 270 after subtracting 3230 from 3500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

The final outcome is 127997.0572755, with a leftover of 2.7e-06.