We look at the division of 28088839 by 686 
We want to figure out the number of times 28088839 can be divided by 686.

Advancing to step 1:
If we divide 2 by 686, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 686

On to step 2:
686 can be fit into 28 0 times, resulting in a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Append the next digit (0) from the dividend to 28 and continue with: 280 / 686

On to step 3:
686 goes into 280 0 times with a remainder of 280.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 280 to get 280.
Take the next digit (8) from the dividend and append it to 280, then repeat: 2808 / 686

Let's proceed to step 4:
686 can be fit into 2808 4 times, resulting in a remainder of 64.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 64 after subtracting 2744 from 2808.
Grab the next digit (8) from the dividend, add it to 64, then carry on: 648 / 686

Going ahead to step 5:
When dividing 648 by 686, we get 0 with a remainder of 648.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
Deduct 0 from 648 and we're left with 648.
Grab the next digit (8) from the dividend, add it to 648, then carry on: 6488 / 686

Advancing to step 6:
6488 divided by 686 is 9 with a remainder of 314.
Record the quotient 9 as the next digit in the result. 
Result so far: 409.0
Deduct 6174 from 6488 and we're left with 314.
Fetch the next digit (3) from the dividend, attach it to 314 and continue: 3143 / 686

Let's proceed to step 7:
If we divide 3143 by 686, we get 4 and a remainder of 399.
Write down 4 as next digit of the result. 
Result so far: 4094.0
The remainder is 399 after subtracting 2744 from 3143.
Fetch the next digit (9) from the dividend, attach it to 399 and continue: 3999 / 686

On to step 8:
If we divide 3999 by 686, we get 5 and a remainder of 569.
The next digit of our result is 5. 
Result so far: 40945.0
If we take 3430 away from 3999, we end up with 569.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5690, and continue the process.

On to step 9:
686 can be fit into 5690 8 times, resulting in a remainder of 202.
Record the quotient 8 as the next digit in the result. 
Result so far: 40945.8
If we take 5488 away from 5690, we end up with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Advancing to step 10:
If we divide 2020 by 686, we get 2 and a remainder of 648.
The number 2 becomes the next digit in our result. 
Result so far: 40945.82
Deduct 1372 from 2020 and we're left with 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Let's proceed to step 11:
If we divide 6480 by 686, we get 9 and a remainder of 306.
Write down 9 as next digit of the result. 
Result so far: 40945.829
If we subtract 6174 from 6480, we get 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

On to step 12:
If we divide 3060 by 686, we get 4 and a remainder of 316.
The next digit of our result is 4. 
Result so far: 40945.8294
The remainder is 316 after subtracting 2744 from 3060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Step 13:
3160 divided by 686 is 4 with a remainder of 416.
The next digit of our result is 4. 
Result so far: 40945.82944
If we subtract 2744 from 3160, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Our division results in 40945.82944 with a remaining 0.000416.