863639 divided by 51 
We want to divide 863639 by 51.

On to step 1:
8 divided by 51 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 51

Moving on to step 2:
When dividing 86 by 51, we get 1 with a remainder of 35.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 51 away from 86, we end up with 35.
Bring next digit (3) of the dividend behind the 35 and repeat the process: 353 / 51

Step 3:
51 goes into 353 6 times with a remainder of 47.
Write down 6 as next digit of the result. 
Result so far: 16.0
The remainder is 47 after subtracting 306 from 353.
Take the next digit (6) from the dividend and append it to 47, then repeat: 476 / 51

Advancing to step 4:
51 goes into 476 9 times with a remainder of 17.
Use 9 as the next digit of our solution. 
Result so far: 169.0
Subtract 459 from 476 to get 17.
Bring next digit (3) of the dividend behind the 17 and repeat the process: 173 / 51

Step 5:
When dividing 173 by 51, we get 3 with a remainder of 20.
Use 3 as the next digit of our solution. 
Result so far: 1693.0
Subtract 153 from 173 to get 20.
Bring next digit (9) of the dividend behind the 20 and repeat the process: 209 / 51

Advancing to step 6:
The number 51 fits into 209 4 times, leaving a remainder of 5.
Put 4 as the next digit of the answer. 
Result so far: 16934.0
Deduct 204 from 209 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 7:
The number 51 fits into 50 0 times, leaving a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 16934.0
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
51 goes into 500 9 times with a remainder of 41.
The next digit of our result is 9. 
Result so far: 16934.09
Subtract 459 from 500 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 9:
51 can be fit into 410 8 times, resulting in a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 16934.098
Subtracting 408 from 410 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 10:
If we divide 20 by 51, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 16934.098
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 11:
200 divided by 51 is 3 with a remainder of 47.
The next digit of our result is 3. 
Result so far: 16934.09803
Subtracting 153 from 200 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 12:
470 divided by 51 is 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 16934.098039
If we take 459 away from 470, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 13:
51 goes into 110 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 16934.0980392
If we subtract 102 from 110, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 14:
If we divide 80 by 51, we get 1 and a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 16934.09803921
If we take 51 away from 80, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

The final outcome is 16934.09803921, with a leftover of 2.9e-08.