We look at the division of 51408530 by 668 
Let's see how many times 668 fits into 51408530.

Let's proceed to step 1:
5 divided by 668 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 668

On to step 2:
668 can be fit into 51 0 times, resulting in a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Fetch the next digit (4) from the dividend, attach it to 51 and continue: 514 / 668

On to step 3:
If we divide 514 by 668, we get 0 and a remainder of 514.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 514 leaves us with 514.
Grab the next digit (0) from the dividend, add it to 514, then carry on: 5140 / 668

Advancing to step 4:
668 can be fit into 5140 7 times, resulting in a remainder of 464.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 464 after subtracting 4676 from 5140.
Grab the next digit (8) from the dividend, add it to 464, then carry on: 4648 / 668

Step 5:
The number 668 fits into 4648 6 times, leaving a remainder of 640.
Put 6 as the next digit of the answer. 
Result so far: 76.0
The remainder is 640 after subtracting 4008 from 4648.
Take the next digit (5) from the dividend and append it to 640, then repeat: 6405 / 668

Moving on to step 6:
668 can be fit into 6405 9 times, resulting in a remainder of 393.
Put 9 as the next digit of the answer. 
Result so far: 769.0
Subtracting 6012 from 6405 leaves us with 393.
Take the next digit (3) from the dividend and append it to 393, then repeat: 3933 / 668

Moving on to step 7:
3933 divided by 668 is 5 with a remainder of 593.
Write down 5 as next digit of the result. 
Result so far: 7695.0
If we subtract 3340 from 3933, we get 593.
Take the next digit (0) from the dividend and append it to 593, then repeat: 5930 / 668

Going ahead to step 8:
668 can be fit into 5930 8 times, resulting in a remainder of 586.
Put 8 as the next digit of the answer. 
Result so far: 76958.0
If we subtract 5344 from 5930, we get 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

Let's proceed to step 9:
If we divide 5860 by 668, we get 8 and a remainder of 516.
Record the quotient 8 as the next digit in the result. 
Result so far: 76958.8
If we subtract 5344 from 5860, we get 516.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5160, and continue the process.

On to step 10:
668 can be fit into 5160 7 times, resulting in a remainder of 484.
Record the quotient 7 as the next digit in the result. 
Result so far: 76958.87
Subtract 4676 from 5160 to get 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Moving on to step 11:
668 can be fit into 4840 7 times, resulting in a remainder of 164.
Use 7 as the next digit of our solution. 
Result so far: 76958.877
Subtracting 4676 from 4840 leaves us with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

After the division, we end up with 76958.877 and a remainder of 0.0164.