We look at the division of 51393757 by 668 
We're looking to find how many times 668 goes into 51393757.

Step 1:
If we divide 5 by 668, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 668

On to step 2:
51 divided by 668 is 0 with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Grab the next digit (3) from the dividend, add it to 51, then carry on: 513 / 668

Step 3:
668 can be fit into 513 0 times, resulting in a remainder of 513.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 513 leaves us with 513.
Fetch the next digit (9) from the dividend, attach it to 513 and continue: 5139 / 668

On to step 4:
668 can be fit into 5139 7 times, resulting in a remainder of 463.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 4676 away from 5139, we end up with 463.
Append the next digit (3) from the dividend to 463 and continue with: 4633 / 668

Advancing to step 5:
If we divide 4633 by 668, we get 6 and a remainder of 625.
Write down 6 as next digit of the result. 
Result so far: 76.0
If we subtract 4008 from 4633, we get 625.
Bring next digit (7) of the dividend behind the 625 and repeat the process: 6257 / 668

Going ahead to step 6:
If we divide 6257 by 668, we get 9 and a remainder of 245.
The number 9 becomes the next digit in our result. 
Result so far: 769.0
The remainder is 245 after subtracting 6012 from 6257.
Grab the next digit (5) from the dividend, add it to 245, then carry on: 2455 / 668

Step 7:
668 can be fit into 2455 3 times, resulting in a remainder of 451.
The number 3 becomes the next digit in our result. 
Result so far: 7693.0
If we subtract 2004 from 2455, we get 451.
Grab the next digit (7) from the dividend, add it to 451, then carry on: 4517 / 668

Step 8:
4517 divided by 668 is 6 with a remainder of 509.
Write down 6 as next digit of the result. 
Result so far: 76936.0
Subtract 4008 from 4517 to get 509.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

Step 9:
5090 divided by 668 is 7 with a remainder of 414.
Write down 7 as next digit of the result. 
Result so far: 76936.7
Subtracting 4676 from 5090 leaves us with 414.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

Advancing to step 10:
When dividing 4140 by 668, we get 6 with a remainder of 132.
The next digit of our result is 6. 
Result so far: 76936.76
Deduct 4008 from 4140 and we're left with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Advancing to step 11:
If we divide 1320 by 668, we get 1 and a remainder of 652.
Put 1 as the next digit of the answer. 
Result so far: 76936.761
The remainder is 652 after subtracting 668 from 1320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6520, and continue the process.

Step 12:
The number 668 fits into 6520 9 times, leaving a remainder of 508.
The next digit of our result is 9. 
Result so far: 76936.7619
Subtracting 6012 from 6520 leaves us with 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

On to step 13:
The number 668 fits into 5080 7 times, leaving a remainder of 404.
The number 7 becomes the next digit in our result. 
Result so far: 76936.76197
Subtracting 4676 from 5080 leaves us with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

On to step 14:
4040 divided by 668 is 6 with a remainder of 32.
Put 6 as the next digit of the answer. 
Result so far: 76936.761976
The remainder is 32 after subtracting 4008 from 4040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 15:
668 can be fit into 320 0 times, resulting in a remainder of 320.
The next digit of our result is 0. 
Result so far: 76936.761976
If we take 0 away from 320, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 16:
668 can be fit into 3200 4 times, resulting in a remainder of 528.
Write down 4 as next digit of the result. 
Result so far: 76936.76197604
Subtract 2672 from 3200 to get 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

In conclusion, the division gives 76936.76197604 with a balance of 5.28e-07.