We look at the division of 21195567 by 686 
Let's see how many times 686 fits into 21195567.

Let's proceed to step 1:
686 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 686

On to step 2:
686 can be fit into 21 0 times, resulting in a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 686

Step 3:
686 goes into 211 0 times with a remainder of 211.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 211 after subtracting 0 from 211.
Append the next digit (9) from the dividend to 211 and continue with: 2119 / 686

On to step 4:
If we divide 2119 by 686, we get 3 and a remainder of 61.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 2058 from 2119 and we're left with 61.
Append the next digit (5) from the dividend to 61 and continue with: 615 / 686

Let's proceed to step 5:
686 goes into 615 0 times with a remainder of 615.
The number 0 becomes the next digit in our result. 
Result so far: 30.0
Subtracting 0 from 615 leaves us with 615.
Grab the next digit (5) from the dividend, add it to 615, then carry on: 6155 / 686

Let's proceed to step 6:
The number 686 fits into 6155 8 times, leaving a remainder of 667.
Put 8 as the next digit of the answer. 
Result so far: 308.0
If we take 5488 away from 6155, we end up with 667.
Include the next digit (6) from the dividend after 667, then repeat: 6676 / 686

Moving on to step 7:
686 goes into 6676 9 times with a remainder of 502.
The number 9 becomes the next digit in our result. 
Result so far: 3089.0
If we subtract 6174 from 6676, we get 502.
Take the next digit (7) from the dividend and append it to 502, then repeat: 5027 / 686

Going ahead to step 8:
686 can be fit into 5027 7 times, resulting in a remainder of 225.
Record the quotient 7 as the next digit in the result. 
Result so far: 30897.0
If we subtract 4802 from 5027, we get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Advancing to step 9:
The number 686 fits into 2250 3 times, leaving a remainder of 192.
Write down 3 as next digit of the result. 
Result so far: 30897.3
If we subtract 2058 from 2250, we get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Step 10:
When dividing 1920 by 686, we get 2 with a remainder of 548.
The number 2 becomes the next digit in our result. 
Result so far: 30897.32
Deduct 1372 from 1920 and we're left with 548.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

Moving on to step 11:
When dividing 5480 by 686, we get 7 with a remainder of 678.
Use 7 as the next digit of our solution. 
Result so far: 30897.327
Subtracting 4802 from 5480 leaves us with 678.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6780, and continue the process.

Let's proceed to step 12:
When dividing 6780 by 686, we get 9 with a remainder of 606.
The number 9 becomes the next digit in our result. 
Result so far: 30897.3279
Subtract 6174 from 6780 to get 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

On to step 13:
6060 divided by 686 is 8 with a remainder of 572.
Write down 8 as next digit of the result. 
Result so far: 30897.32798
If we subtract 5488 from 6060, we get 572.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Going ahead to step 14:
If we divide 5720 by 686, we get 8 and a remainder of 232.
Put 8 as the next digit of the answer. 
Result so far: 30897.327988
The remainder is 232 after subtracting 5488 from 5720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

The final outcome is 30897.327988, with a leftover of 2.32e-05.