We're dividing 18468645 by 686 
We're looking to find how many times 686 goes into 18468645.

Going ahead to step 1:
The number 686 fits into 1 0 times, leaving 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.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 686

Let's proceed to step 2:
18 divided by 686 is 0 with a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 18 leaves us with 18.
Bring next digit (4) of the dividend behind the 18 and repeat the process: 184 / 686

Advancing to step 3:
184 divided by 686 is 0 with a remainder of 184.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 184, we get 184.
Bring next digit (6) of the dividend behind the 184 and repeat the process: 1846 / 686

Moving on to step 4:
When dividing 1846 by 686, we get 2 with a remainder of 474.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 1372 away from 1846, we end up with 474.
Include the next digit (8) from the dividend after 474, then repeat: 4748 / 686

Going ahead to step 5:
The number 686 fits into 4748 6 times, leaving a remainder of 632.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
Deduct 4116 from 4748 and we're left with 632.
Fetch the next digit (6) from the dividend, attach it to 632 and continue: 6326 / 686

On to step 6:
686 can be fit into 6326 9 times, resulting in a remainder of 152.
The number 9 becomes the next digit in our result. 
Result so far: 269.0
Deduct 6174 from 6326 and we're left with 152.
Append the next digit (4) from the dividend to 152 and continue with: 1524 / 686

Step 7:
If we divide 1524 by 686, we get 2 and a remainder of 152.
Record the quotient 2 as the next digit in the result. 
Result so far: 2692.0
Deduct 1372 from 1524 and we're left with 152.
Append the next digit (5) from the dividend to 152 and continue with: 1525 / 686

Moving on to step 8:
If we divide 1525 by 686, we get 2 and a remainder of 153.
The number 2 becomes the next digit in our result. 
Result so far: 26922.0
Deduct 1372 from 1525 and we're left with 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

On to step 9:
1530 divided by 686 is 2 with a remainder of 158.
Record the quotient 2 as the next digit in the result. 
Result so far: 26922.2
If we subtract 1372 from 1530, we get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Advancing to step 10:
When dividing 1580 by 686, we get 2 with a remainder of 208.
Use 2 as the next digit of our solution. 
Result so far: 26922.22
Subtracting 1372 from 1580 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

The final result is 26922.22 with a remainder of 0.208.