855231 ÷ 51 
We want to divide 855231 by 51.

Step 1:
When dividing 8 by 51, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 51

Step 2:
51 can be fit into 85 1 times, resulting in a remainder of 34.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 51 from 85 to get 34.
Include the next digit (5) from the dividend after 34, then repeat: 345 / 51

On to step 3:
The number 51 fits into 345 6 times, leaving a remainder of 39.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
If we subtract 306 from 345, we get 39.
Append the next digit (2) from the dividend to 39 and continue with: 392 / 51

On to step 4:
392 divided by 51 is 7 with a remainder of 35.
Put 7 as the next digit of the answer. 
Result so far: 167.0
Subtracting 357 from 392 leaves us with 35.
Bring next digit (3) of the dividend behind the 35 and repeat the process: 353 / 51

On to step 5:
When dividing 353 by 51, we get 6 with a remainder of 47.
Record the quotient 6 as the next digit in the result. 
Result so far: 1676.0
Deduct 306 from 353 and we're left with 47.
Fetch the next digit (1) from the dividend, attach it to 47 and continue: 471 / 51

Going ahead to step 6:
If we divide 471 by 51, we get 9 and a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 16769.0
Subtract 459 from 471 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 7:
When dividing 120 by 51, we get 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 16769.2
If we take 102 away from 120, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 8:
51 goes into 180 3 times with a remainder of 27.
Put 3 as the next digit of the answer. 
Result so far: 16769.23
Subtracting 153 from 180 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 9:
If we divide 270 by 51, we get 5 and a remainder of 15.
The next digit of our result is 5. 
Result so far: 16769.235
The remainder is 15 after subtracting 255 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 10:
The number 51 fits into 150 2 times, leaving a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 16769.2352
If we take 102 away from 150, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 11:
480 divided by 51 is 9 with a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 16769.23529
If we subtract 459 from 480, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 12:
51 can be fit into 210 4 times, resulting in a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 16769.235294
Subtracting 204 from 210 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 13:
If we divide 60 by 51, we get 1 and a remainder of 9.
The next digit of our result is 1. 
Result so far: 16769.2352941
Subtracting 51 from 60 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 14:
When dividing 90 by 51, we get 1 with a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 16769.23529411
The remainder is 39 after subtracting 51 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The final outcome is 16769.23529411, with a leftover of 3.9e-08.