55216957 ÷ 686 
Let's see how many times 686 fits into 55216957.

On to step 1:
If we divide 5 by 686, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 686

Let's proceed to step 2:
If we divide 55 by 686, we get 0 and a remainder of 55.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 55 to get 55.
Grab the next digit (2) from the dividend, add it to 55, then carry on: 552 / 686

Let's proceed to step 3:
The number 686 fits into 552 0 times, leaving a remainder of 552.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 552 leaves us with 552.
Take the next digit (1) from the dividend and append it to 552, then repeat: 5521 / 686

Going ahead to step 4:
686 can be fit into 5521 8 times, resulting in a remainder of 33.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we take 5488 away from 5521, we end up with 33.
Grab the next digit (6) from the dividend, add it to 33, then carry on: 336 / 686

Going ahead to step 5:
686 goes into 336 0 times with a remainder of 336.
Put 0 as the next digit of the answer. 
Result so far: 80.0
Subtract 0 from 336 to get 336.
Grab the next digit (9) from the dividend, add it to 336, then carry on: 3369 / 686

Step 6:
686 can be fit into 3369 4 times, resulting in a remainder of 625.
Write down 4 as next digit of the result. 
Result so far: 804.0
Subtracting 2744 from 3369 leaves us with 625.
Grab the next digit (5) from the dividend, add it to 625, then carry on: 6255 / 686

Let's proceed to step 7:
When dividing 6255 by 686, we get 9 with a remainder of 81.
Record the quotient 9 as the next digit in the result. 
Result so far: 8049.0
Subtract 6174 from 6255 to get 81.
Append the next digit (7) from the dividend to 81 and continue with: 817 / 686

Going ahead to step 8:
When dividing 817 by 686, we get 1 with a remainder of 131.
The number 1 becomes the next digit in our result. 
Result so far: 80491.0
Subtract 686 from 817 to get 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Advancing to step 9:
686 can be fit into 1310 1 times, resulting in a remainder of 624.
Use 1 as the next digit of our solution. 
Result so far: 80491.1
If we subtract 686 from 1310, we get 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

On to step 10:
686 can be fit into 6240 9 times, resulting in a remainder of 66.
The next digit of our result is 9. 
Result so far: 80491.19
Subtract 6174 from 6240 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 11:
686 can be fit into 660 0 times, resulting in a remainder of 660.
Record the quotient 0 as the next digit in the result. 
Result so far: 80491.19
If we take 0 away from 660, we end up with 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Moving on to step 12:
The number 686 fits into 6600 9 times, leaving a remainder of 426.
Put 9 as the next digit of the answer. 
Result so far: 80491.1909
The remainder is 426 after subtracting 6174 from 6600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Step 13:
If we divide 4260 by 686, we get 6 and a remainder of 144.
Write down 6 as next digit of the result. 
Result so far: 80491.19096
Deduct 4116 from 4260 and we're left with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Let's proceed to step 14:
686 can be fit into 1440 2 times, resulting in a remainder of 68.
Record the quotient 2 as the next digit in the result. 
Result so far: 80491.190962
If we take 1372 away from 1440, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 15:
When dividing 680 by 686, we get 0 with a remainder of 680.
The next digit of our result is 0. 
Result so far: 80491.190962
Subtracting 0 from 680 leaves us with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Advancing to step 16:
686 goes into 6800 9 times with a remainder of 626.
Use 9 as the next digit of our solution. 
Result so far: 80491.19096209
If we take 6174 away from 6800, we end up with 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

In conclusion, the division gives 80491.19096209 with a balance of 6.26e-07.