51286635 divided by 256 
Let's see how many times 256 fits into 51286635.

Advancing to step 1:
The number 256 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 256

On to step 2:
256 can be fit into 51 0 times, resulting in a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Grab the next digit (2) from the dividend, add it to 51, then carry on: 512 / 256

Advancing to step 3:
256 can be fit into 512 2 times, resulting in a remainder of 0.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 512 from 512, we get 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 256

Moving on to step 4:
The number 256 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 20.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 256

Advancing to step 5:
The number 256 fits into 86 0 times, leaving a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 200.0
Deduct 0 from 86 and we're left with 86.
Fetch the next digit (6) from the dividend, attach it to 86 and continue: 866 / 256

Let's proceed to step 6:
866 divided by 256 is 3 with a remainder of 98.
The number 3 becomes the next digit in our result. 
Result so far: 2003.0
Subtract 768 from 866 to get 98.
Include the next digit (3) from the dividend after 98, then repeat: 983 / 256

Advancing to step 7:
983 divided by 256 is 3 with a remainder of 215.
The next digit of our result is 3. 
Result so far: 20033.0
The remainder is 215 after subtracting 768 from 983.
Fetch the next digit (5) from the dividend, attach it to 215 and continue: 2155 / 256

Step 8:
The number 256 fits into 2155 8 times, leaving a remainder of 107.
Record the quotient 8 as the next digit in the result. 
Result so far: 200338.0
Subtract 2048 from 2155 to get 107.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1070, and continue the process.

Advancing to step 9:
1070 divided by 256 is 4 with a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 200338.4
If we subtract 1024 from 1070, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 10:
460 divided by 256 is 1 with a remainder of 204.
The next digit of our result is 1. 
Result so far: 200338.41
Subtracting 256 from 460 leaves us with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

On to step 11:
The number 256 fits into 2040 7 times, leaving a remainder of 248.
Write down 7 as next digit of the result. 
Result so far: 200338.417
The remainder is 248 after subtracting 1792 from 2040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

On to step 12:
256 goes into 2480 9 times with a remainder of 176.
The next digit of our result is 9. 
Result so far: 200338.4179
Subtracting 2304 from 2480 leaves us with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

On to step 13:
If we divide 1760 by 256, we get 6 and a remainder of 224.
Write down 6 as next digit of the result. 
Result so far: 200338.41796
If we subtract 1536 from 1760, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Advancing to step 14:
If we divide 2240 by 256, we get 8 and a remainder of 192.
Put 8 as the next digit of the answer. 
Result so far: 200338.417968
If we subtract 2048 from 2240, we get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Going ahead to step 15:
If we divide 1920 by 256, we get 7 and a remainder of 128.
The number 7 becomes the next digit in our result. 
Result so far: 200338.4179687
If we subtract 1792 from 1920, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Moving on to step 16:
1280 divided by 256 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 200338.41796875
Deduct 1280 from 1280 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 200338.41796875, with a leftover of 0.0.