We look at the division of 2128510 by 668 
Let's see how many times 668 fits into 2128510.

Step 1:
2 divided by 668 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 668

Let's proceed to step 2:
668 can be fit into 21 0 times, resulting in a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (2) from the dividend to 21 and continue with: 212 / 668

Going ahead to step 3:
668 goes into 212 0 times with a remainder of 212.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 212 leaves us with 212.
Fetch the next digit (8) from the dividend, attach it to 212 and continue: 2128 / 668

Let's proceed to step 4:
The number 668 fits into 2128 3 times, leaving a remainder of 124.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 2004 from 2128 leaves us with 124.
Include the next digit (5) from the dividend after 124, then repeat: 1245 / 668

On to step 5:
668 goes into 1245 1 times with a remainder of 577.
The number 1 becomes the next digit in our result. 
Result so far: 31.0
Subtracting 668 from 1245 leaves us with 577.
Fetch the next digit (1) from the dividend, attach it to 577 and continue: 5771 / 668

Let's proceed to step 6:
When dividing 5771 by 668, we get 8 with a remainder of 427.
The number 8 becomes the next digit in our result. 
Result so far: 318.0
If we take 5344 away from 5771, we end up with 427.
Bring next digit (0) of the dividend behind the 427 and repeat the process: 4270 / 668

Moving on to step 7:
4270 divided by 668 is 6 with a remainder of 262.
Record the quotient 6 as the next digit in the result. 
Result so far: 3186.0
Subtracting 4008 from 4270 leaves us with 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Let's proceed to step 8:
668 goes into 2620 3 times with a remainder of 616.
Record the quotient 3 as the next digit in the result. 
Result so far: 3186.3
If we subtract 2004 from 2620, we get 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Going ahead to step 9:
The number 668 fits into 6160 9 times, leaving a remainder of 148.
Use 9 as the next digit of our solution. 
Result so far: 3186.39
If we take 6012 away from 6160, we end up with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Step 10:
668 can be fit into 1480 2 times, resulting in a remainder of 144.
Write down 2 as next digit of the result. 
Result so far: 3186.392
If we subtract 1336 from 1480, we get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Moving on to step 11:
668 can be fit into 1440 2 times, resulting in a remainder of 104.
Use 2 as the next digit of our solution. 
Result so far: 3186.3922
Subtracting 1336 from 1440 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

The final result is 3186.3922 with a remainder of 0.00104.