865931 divided by 51 
We're looking to find how many times 51 goes into 865931.

Step 1:
8 divided by 51 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 51

Step 2:
51 can be fit into 86 1 times, resulting in 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.
Take the next digit (5) from the dividend and append it to 35, then repeat: 355 / 51

Let's proceed to step 3:
If we divide 355 by 51, we get 6 and a remainder of 49.
Write down 6 as next digit of the result. 
Result so far: 16.0
The remainder is 49 after subtracting 306 from 355.
Grab the next digit (9) from the dividend, add it to 49, then carry on: 499 / 51

Moving on to step 4:
51 can be fit into 499 9 times, resulting in a remainder of 40.
The next digit of our result is 9. 
Result so far: 169.0
Deduct 459 from 499 and we're left with 40.
Bring next digit (3) of the dividend behind the 40 and repeat the process: 403 / 51

Let's proceed to step 5:
If we divide 403 by 51, we get 7 and a remainder of 46.
The number 7 becomes the next digit in our result. 
Result so far: 1697.0
Subtract 357 from 403 to get 46.
Grab the next digit (1) from the dividend, add it to 46, then carry on: 461 / 51

Let's proceed to step 6:
The number 51 fits into 461 9 times, leaving a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 16979.0
The remainder is 2 after subtracting 459 from 461.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
When dividing 20 by 51, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 16979.0
Subtracting 0 from 20 leaves us 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.

Going ahead to step 8:
When dividing 200 by 51, we get 3 with a remainder of 47.
The next digit of our result is 3. 
Result so far: 16979.03
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.

Advancing to step 9:
470 divided by 51 is 9 with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 16979.039
Subtracting 459 from 470 leaves us 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.

On to step 10:
51 goes into 110 2 times with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 16979.0392
Deduct 102 from 110 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 11:
51 goes into 80 1 times with a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 16979.03921
Deduct 51 from 80 and we're left 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.

On to step 12:
51 can be fit into 290 5 times, resulting in a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 16979.039215
Deduct 255 from 290 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 13:
51 can be fit into 350 6 times, resulting in a remainder of 44.
The next digit of our result is 6. 
Result so far: 16979.0392156
Subtracting 306 from 350 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 14:
440 divided by 51 is 8 with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 16979.03921568
Subtracting 408 from 440 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 16979.03921568 and a remainder of 3.2e-08.