28680295 ÷ 21 
We're looking to find how many times 21 goes into 28680295.

On to step 1:
21 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 21

Let's proceed to step 2:
21 can be fit into 28 1 times, resulting in a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 21 from 28, we get 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 21

Advancing to step 3:
21 can be fit into 76 3 times, resulting in a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we subtract 63 from 76, we get 13.
Bring next digit (8) of the dividend behind the 13 and repeat the process: 138 / 21

Moving on to step 4:
21 goes into 138 6 times with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 136.0
Deduct 126 from 138 and we're left with 12.
Take the next digit (0) from the dividend and append it to 12, then repeat: 120 / 21

Step 5:
21 goes into 120 5 times with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 1365.0
Subtracting 105 from 120 leaves us with 15.
Append the next digit (2) from the dividend to 15 and continue with: 152 / 21

Advancing to step 6:
21 can be fit into 152 7 times, resulting in a remainder of 5.
The next digit of our result is 7. 
Result so far: 13657.0
If we subtract 147 from 152, we get 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 21

Going ahead to step 7:
59 divided by 21 is 2 with a remainder of 17.
Record the quotient 2 as the next digit in the result. 
Result so far: 136572.0
If we take 42 away from 59, we end up with 17.
Bring next digit (5) of the dividend behind the 17 and repeat the process: 175 / 21

Going ahead to step 8:
When dividing 175 by 21, we get 8 with a remainder of 7.
Write down 8 as next digit of the result. 
Result so far: 1365728.0
The remainder is 7 after subtracting 168 from 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 9:
70 divided by 21 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 1365728.3
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 10:
21 goes into 70 3 times with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 1365728.33
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

In conclusion, the division gives 1365728.33 with a balance of 0.007.