66871316 ÷ 686 
Let's see how many times 686 fits into 66871316.

Step 1:
If we divide 6 by 686, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 686

Moving on to step 2:
If we divide 66 by 686, we get 0 and a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Fetch the next digit (8) from the dividend, attach it to 66 and continue: 668 / 686

Step 3:
668 divided by 686 is 0 with a remainder of 668.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 668 leaves us with 668.
Include the next digit (7) from the dividend after 668, then repeat: 6687 / 686

Step 4:
686 can be fit into 6687 9 times, resulting in a remainder of 513.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 513 after subtracting 6174 from 6687.
Bring next digit (1) of the dividend behind the 513 and repeat the process: 5131 / 686

Advancing to step 5:
When dividing 5131 by 686, we get 7 with a remainder of 329.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
Subtract 4802 from 5131 to get 329.
Include the next digit (3) from the dividend after 329, then repeat: 3293 / 686

Advancing to step 6:
The number 686 fits into 3293 4 times, leaving a remainder of 549.
Use 4 as the next digit of our solution. 
Result so far: 974.0
The remainder is 549 after subtracting 2744 from 3293.
Take the next digit (1) from the dividend and append it to 549, then repeat: 5491 / 686

Step 7:
5491 divided by 686 is 8 with a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 9748.0
If we subtract 5488 from 5491, we get 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 686

Advancing to step 8:
When dividing 36 by 686, we get 0 with a remainder of 36.
Put 0 as the next digit of the answer. 
Result so far: 97480.0
If we take 0 away from 36, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 9:
The number 686 fits into 360 0 times, leaving a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 97480.0
Subtracting 0 from 360 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

On to step 10:
686 goes into 3600 5 times with a remainder of 170.
Use 5 as the next digit of our solution. 
Result so far: 97480.05
If we subtract 3430 from 3600, we get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Advancing to step 11:
When dividing 1700 by 686, we get 2 with a remainder of 328.
Use 2 as the next digit of our solution. 
Result so far: 97480.052
Subtracting 1372 from 1700 leaves us with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Let's proceed to step 12:
3280 divided by 686 is 4 with a remainder of 536.
Record the quotient 4 as the next digit in the result. 
Result so far: 97480.0524
The remainder is 536 after subtracting 2744 from 3280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

On to step 13:
When dividing 5360 by 686, we get 7 with a remainder of 558.
Write down 7 as next digit of the result. 
Result so far: 97480.05247
Deduct 4802 from 5360 and we're left with 558.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5580, and continue the process.

Advancing to step 14:
686 goes into 5580 8 times with a remainder of 92.
The next digit of our result is 8. 
Result so far: 97480.052478
If we take 5488 away from 5580, we end up with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Moving on to step 15:
686 can be fit into 920 1 times, resulting in a remainder of 234.
Record the quotient 1 as the next digit in the result. 
Result so far: 97480.0524781
If we take 686 away from 920, we end up with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Moving on to step 16:
If we divide 2340 by 686, we get 3 and a remainder of 282.
Record the quotient 3 as the next digit in the result. 
Result so far: 97480.05247813
Deduct 2058 from 2340 and we're left with 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

In conclusion, the division gives 97480.05247813 with a balance of 2.82e-07.