28406997 ÷ 668 
We're looking to find how many times 668 goes into 28406997.

On to step 1:
The number 668 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 668

Let's proceed to step 2:
The number 668 fits into 28 0 times, leaving a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 28, we get 28.
Bring next digit (4) of the dividend behind the 28 and repeat the process: 284 / 668

Advancing to step 3:
The number 668 fits into 284 0 times, leaving a remainder of 284.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 284 after subtracting 0 from 284.
Grab the next digit (0) from the dividend, add it to 284, then carry on: 2840 / 668

Advancing to step 4:
If we divide 2840 by 668, we get 4 and a remainder of 168.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 2672 from 2840 and we're left with 168.
Include the next digit (6) from the dividend after 168, then repeat: 1686 / 668

On to step 5:
668 goes into 1686 2 times with a remainder of 350.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
The remainder is 350 after subtracting 1336 from 1686.
Grab the next digit (9) from the dividend, add it to 350, then carry on: 3509 / 668

On to step 6:
668 can be fit into 3509 5 times, resulting in a remainder of 169.
Put 5 as the next digit of the answer. 
Result so far: 425.0
Subtract 3340 from 3509 to get 169.
Bring next digit (9) of the dividend behind the 169 and repeat the process: 1699 / 668

Moving on to step 7:
If we divide 1699 by 668, we get 2 and a remainder of 363.
Record the quotient 2 as the next digit in the result. 
Result so far: 4252.0
The remainder is 363 after subtracting 1336 from 1699.
Include the next digit (7) from the dividend after 363, then repeat: 3637 / 668

Going ahead to step 8:
The number 668 fits into 3637 5 times, leaving a remainder of 297.
The next digit of our result is 5. 
Result so far: 42525.0
The remainder is 297 after subtracting 3340 from 3637.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

On to step 9:
668 goes into 2970 4 times with a remainder of 298.
The number 4 becomes the next digit in our result. 
Result so far: 42525.4
If we subtract 2672 from 2970, we get 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

On to step 10:
The number 668 fits into 2980 4 times, leaving a remainder of 308.
The number 4 becomes the next digit in our result. 
Result so far: 42525.44
Deduct 2672 from 2980 and we're left with 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

The quotient of the division is 42525.44, and the remainder is 0.308.