8820422 ÷ 686 
Let's see how many times 686 fits into 8820422.

On to step 1:
686 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
The remainder is 8 after subtracting 0 from 8.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 686

On to step 2:
If we divide 88 by 686, we get 0 and a remainder of 88.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 88 after subtracting 0 from 88.
Include the next digit (2) from the dividend after 88, then repeat: 882 / 686

Moving on to step 3:
686 goes into 882 1 times with a remainder of 196.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 686 from 882 and we're left with 196.
Grab the next digit (0) from the dividend, add it to 196, then carry on: 1960 / 686

On to step 4:
If we divide 1960 by 686, we get 2 and a remainder of 588.
Put 2 as the next digit of the answer. 
Result so far: 12.0
The remainder is 588 after subtracting 1372 from 1960.
Fetch the next digit (4) from the dividend, attach it to 588 and continue: 5884 / 686

Advancing to step 5:
686 goes into 5884 8 times with a remainder of 396.
Use 8 as the next digit of our solution. 
Result so far: 128.0
If we subtract 5488 from 5884, we get 396.
Take the next digit (2) from the dividend and append it to 396, then repeat: 3962 / 686

Step 6:
686 can be fit into 3962 5 times, resulting in a remainder of 532.
The number 5 becomes the next digit in our result. 
Result so far: 1285.0
If we take 3430 away from 3962, we end up with 532.
Take the next digit (2) from the dividend and append it to 532, then repeat: 5322 / 686

On to step 7:
When dividing 5322 by 686, we get 7 with a remainder of 520.
Record the quotient 7 as the next digit in the result. 
Result so far: 12857.0
Subtracting 4802 from 5322 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Step 8:
The number 686 fits into 5200 7 times, leaving a remainder of 398.
Put 7 as the next digit of the answer. 
Result so far: 12857.7
The remainder is 398 after subtracting 4802 from 5200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Going ahead to step 9:
686 can be fit into 3980 5 times, resulting in a remainder of 550.
The number 5 becomes the next digit in our result. 
Result so far: 12857.75
Deduct 3430 from 3980 and we're left with 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

Advancing to step 10:
If we divide 5500 by 686, we get 8 and a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 12857.758
The remainder is 12 after subtracting 5488 from 5500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 11:
When dividing 120 by 686, we get 0 with a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 12857.758
If we subtract 0 from 120, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 12:
If we divide 1200 by 686, we get 1 and a remainder of 514.
Write down 1 as next digit of the result. 
Result so far: 12857.75801
The remainder is 514 after subtracting 686 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5140, and continue the process.

On to step 13:
686 can be fit into 5140 7 times, resulting in a remainder of 338.
Put 7 as the next digit of the answer. 
Result so far: 12857.758017
If we take 4802 away from 5140, we end up with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Going ahead to step 14:
686 can be fit into 3380 4 times, resulting in a remainder of 636.
Use 4 as the next digit of our solution. 
Result so far: 12857.7580174
Deduct 2744 from 3380 and we're left with 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

Let's proceed to step 15:
6360 divided by 686 is 9 with a remainder of 186.
Use 9 as the next digit of our solution. 
Result so far: 12857.75801749
Subtract 6174 from 6360 to get 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

The final outcome is 12857.75801749, with a leftover of 1.86e-07.