1640982 ÷ 686 
Let's see how many times 686 fits into 1640982.

Let's proceed to step 1:
1 divided by 686 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 686

On to step 2:
16 divided by 686 is 0 with a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 16 after subtracting 0 from 16.
Fetch the next digit (4) from the dividend, attach it to 16 and continue: 164 / 686

On to step 3:
686 can be fit into 164 0 times, resulting in a remainder of 164.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 164 after subtracting 0 from 164.
Take the next digit (0) from the dividend and append it to 164, then repeat: 1640 / 686

Moving on to step 4:
686 goes into 1640 2 times with a remainder of 268.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 1372 away from 1640, we end up with 268.
Take the next digit (9) from the dividend and append it to 268, then repeat: 2689 / 686

Going ahead to step 5:
686 can be fit into 2689 3 times, resulting in a remainder of 631.
Put 3 as the next digit of the answer. 
Result so far: 23.0
Subtracting 2058 from 2689 leaves us with 631.
Bring next digit (8) of the dividend behind the 631 and repeat the process: 6318 / 686

Step 6:
686 goes into 6318 9 times with a remainder of 144.
Put 9 as the next digit of the answer. 
Result so far: 239.0
If we subtract 6174 from 6318, we get 144.
Fetch the next digit (2) from the dividend, attach it to 144 and continue: 1442 / 686

Advancing to step 7:
The number 686 fits into 1442 2 times, leaving a remainder of 70.
The next digit of our result is 2. 
Result so far: 2392.0
Deduct 1372 from 1442 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
700 divided by 686 is 1 with a remainder of 14.
The next digit of our result is 1. 
Result so far: 2392.1
The remainder is 14 after subtracting 686 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 9:
If we divide 140 by 686, we get 0 and a remainder of 140.
Record the quotient 0 as the next digit in the result. 
Result so far: 2392.1
Subtracting 0 from 140 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 10:
If we divide 1400 by 686, we get 2 and a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 2392.102
If we take 1372 away from 1400, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 11:
When dividing 280 by 686, we get 0 with a remainder of 280.
Write down 0 as next digit of the result. 
Result so far: 2392.102
If we subtract 0 from 280, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 12:
When dividing 2800 by 686, we get 4 with a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 2392.10204
The remainder is 56 after subtracting 2744 from 2800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 13:
560 divided by 686 is 0 with a remainder of 560.
The next digit of our result is 0. 
Result so far: 2392.10204
Deduct 0 from 560 and we're left with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Moving on to step 14:
If we divide 5600 by 686, we get 8 and a remainder of 112.
The number 8 becomes the next digit in our result. 
Result so far: 2392.1020408
The remainder is 112 after subtracting 5488 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

On to step 15:
The number 686 fits into 1120 1 times, leaving a remainder of 434.
Record the quotient 1 as the next digit in the result. 
Result so far: 2392.10204081
The remainder is 434 after subtracting 686 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4340, and continue the process.

The final result is 2392.10204081 with a remainder of 4.34e-07.