We look at the division of 54959239 by 686 
Our goal is to divide 54959239 by 686.

On to step 1:
686 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 686

Moving on to step 2:
686 can be fit into 54 0 times, resulting in a remainder of 54.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 54, we get 54.
Include the next digit (9) from the dividend after 54, then repeat: 549 / 686

On to step 3:
686 goes into 549 0 times with a remainder of 549.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 549, we end up with 549.
Bring next digit (5) of the dividend behind the 549 and repeat the process: 5495 / 686

Advancing to step 4:
The number 686 fits into 5495 8 times, leaving a remainder of 7.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 5488 from 5495 leaves us with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 686

On to step 5:
If we divide 79 by 686, we get 0 and a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 80.0
The remainder is 79 after subtracting 0 from 79.
Bring next digit (2) of the dividend behind the 79 and repeat the process: 792 / 686

On to step 6:
The number 686 fits into 792 1 times, leaving a remainder of 106.
The number 1 becomes the next digit in our result. 
Result so far: 801.0
If we take 686 away from 792, we end up with 106.
Bring next digit (3) of the dividend behind the 106 and repeat the process: 1063 / 686

Advancing to step 7:
The number 686 fits into 1063 1 times, leaving a remainder of 377.
Put 1 as the next digit of the answer. 
Result so far: 8011.0
If we take 686 away from 1063, we end up with 377.
Take the next digit (9) from the dividend and append it to 377, then repeat: 3779 / 686

Step 8:
686 goes into 3779 5 times with a remainder of 349.
Write down 5 as next digit of the result. 
Result so far: 80115.0
The remainder is 349 after subtracting 3430 from 3779.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Let's proceed to step 9:
3490 divided by 686 is 5 with a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 80115.5
Subtract 3430 from 3490 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 10:
686 can be fit into 600 0 times, resulting in a remainder of 600.
Put 0 as the next digit of the answer. 
Result so far: 80115.5
If we subtract 0 from 600, we get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Step 11:
686 goes into 6000 8 times with a remainder of 512.
Write down 8 as next digit of the result. 
Result so far: 80115.508
If we take 5488 away from 6000, we end up with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Step 12:
If we divide 5120 by 686, we get 7 and a remainder of 318.
Put 7 as the next digit of the answer. 
Result so far: 80115.5087
The remainder is 318 after subtracting 4802 from 5120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Advancing to step 13:
686 goes into 3180 4 times with a remainder of 436.
The next digit of our result is 4. 
Result so far: 80115.50874
Subtracting 2744 from 3180 leaves us with 436.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

Advancing to step 14:
When dividing 4360 by 686, we get 6 with a remainder of 244.
Put 6 as the next digit of the answer. 
Result so far: 80115.508746
If we take 4116 away from 4360, we end up with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Step 15:
686 can be fit into 2440 3 times, resulting in a remainder of 382.
Write down 3 as next digit of the result. 
Result so far: 80115.5087463
Subtract 2058 from 2440 to get 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Let's proceed to step 16:
When dividing 3820 by 686, we get 5 with a remainder of 390.
The number 5 becomes the next digit in our result. 
Result so far: 80115.50874635
Subtracting 3430 from 3820 leaves us with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

In conclusion, the division gives 80115.50874635 with a balance of 3.9e-07.