51595728 ÷ 678 
Our goal is to divide 51595728 by 678.

Advancing to step 1:
678 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 678

Going ahead to step 2:
If we divide 51 by 678, we get 0 and a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 678

Advancing to step 3:
678 can be fit into 515 0 times, resulting in a remainder of 515.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 515 after subtracting 0 from 515.
Append the next digit (9) from the dividend to 515 and continue with: 5159 / 678

Step 4:
5159 divided by 678 is 7 with a remainder of 413.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 413 after subtracting 4746 from 5159.
Append the next digit (5) from the dividend to 413 and continue with: 4135 / 678

Going ahead to step 5:
678 can be fit into 4135 6 times, resulting in a remainder of 67.
Write down 6 as next digit of the result. 
Result so far: 76.0
Subtracting 4068 from 4135 leaves us with 67.
Take the next digit (7) from the dividend and append it to 67, then repeat: 677 / 678

Let's proceed to step 6:
When dividing 677 by 678, we get 0 with a remainder of 677.
Put 0 as the next digit of the answer. 
Result so far: 760.0
Deduct 0 from 677 and we're left with 677.
Bring next digit (2) of the dividend behind the 677 and repeat the process: 6772 / 678

Advancing to step 7:
If we divide 6772 by 678, we get 9 and a remainder of 670.
Record the quotient 9 as the next digit in the result. 
Result so far: 7609.0
Subtracting 6102 from 6772 leaves us with 670.
Take the next digit (8) from the dividend and append it to 670, then repeat: 6708 / 678

On to step 8:
If we divide 6708 by 678, we get 9 and a remainder of 606.
Record the quotient 9 as the next digit in the result. 
Result so far: 76099.0
The remainder is 606 after subtracting 6102 from 6708.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

Step 9:
If we divide 6060 by 678, we get 8 and a remainder of 636.
Use 8 as the next digit of our solution. 
Result so far: 76099.8
Subtracting 5424 from 6060 leaves us with 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

Moving on to step 10:
When dividing 6360 by 678, we get 9 with a remainder of 258.
Use 9 as the next digit of our solution. 
Result so far: 76099.89
If we subtract 6102 from 6360, we get 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

On to step 11:
The number 678 fits into 2580 3 times, leaving a remainder of 546.
The number 3 becomes the next digit in our result. 
Result so far: 76099.893
If we take 2034 away from 2580, we end up with 546.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5460, and continue the process.

On to step 12:
5460 divided by 678 is 8 with a remainder of 36.
Use 8 as the next digit of our solution. 
Result so far: 76099.8938
Subtracting 5424 from 5460 leaves us with 36.
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 13:
If we divide 360 by 678, we get 0 and a remainder of 360.
The number 0 becomes the next digit in our result. 
Result so far: 76099.8938
Deduct 0 from 360 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

On to step 14:
When dividing 3600 by 678, we get 5 with a remainder of 210.
Write down 5 as next digit of the result. 
Result so far: 76099.893805
The remainder is 210 after subtracting 3390 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

On to step 15:
The number 678 fits into 2100 3 times, leaving a remainder of 66.
Use 3 as the next digit of our solution. 
Result so far: 76099.8938053
Subtracting 2034 from 2100 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 16:
678 can be fit into 660 0 times, resulting in a remainder of 660.
Record the quotient 0 as the next digit in the result. 
Result so far: 76099.8938053
Subtract 0 from 660 to get 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

The final result is 76099.8938053 with a remainder of 6.6e-07.