We look at the division of 668187 by 51 
Let's see how many times 51 fits into 668187.

Moving on to step 1:
When dividing 6 by 51, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 51

Moving on to step 2:
51 can be fit into 66 1 times, resulting in a remainder of 15.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 51 from 66, we get 15.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 51

Let's proceed to step 3:
51 goes into 158 3 times with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Deduct 153 from 158 and we're left with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 51

Moving on to step 4:
51 can be fit into 51 1 times, resulting in a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 131.0
Subtract 51 from 51 to get 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 51

On to step 5:
If we divide 8 by 51, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 1310.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 51

Going ahead to step 6:
When dividing 87 by 51, we get 1 with a remainder of 36.
Write down 1 as next digit of the result. 
Result so far: 13101.0
The remainder is 36 after subtracting 51 from 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 7:
The number 51 fits into 360 7 times, leaving a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 13101.7
Deduct 357 from 360 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 8:
If we divide 30 by 51, we get 0 and a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 13101.7
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 9:
51 can be fit into 300 5 times, resulting in a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 13101.705
If we subtract 255 from 300, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 10:
450 divided by 51 is 8 with a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 13101.7058
If we subtract 408 from 450, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 11:
51 goes into 420 8 times with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 13101.70588
If we subtract 408 from 420, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 13101.70588, with a leftover of 1.2e-05.