861685 ÷ 51 
Our goal is to divide 861685 by 51.

Moving on to step 1:
8 divided by 51 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 51

On to step 2:
51 can be fit into 86 1 times, resulting in a remainder of 35.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 51 from 86 leaves us with 35.
Grab the next digit (1) from the dividend, add it to 35, then carry on: 351 / 51

On to step 3:
When dividing 351 by 51, we get 6 with a remainder of 45.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
The remainder is 45 after subtracting 306 from 351.
Append the next digit (6) from the dividend to 45 and continue with: 456 / 51

Going ahead to step 4:
The number 51 fits into 456 8 times, leaving a remainder of 48.
Use 8 as the next digit of our solution. 
Result so far: 168.0
If we take 408 away from 456, we end up with 48.
Include the next digit (8) from the dividend after 48, then repeat: 488 / 51

Let's proceed to step 5:
51 goes into 488 9 times with a remainder of 29.
Write down 9 as next digit of the result. 
Result so far: 1689.0
Subtracting 459 from 488 leaves us with 29.
Include the next digit (5) from the dividend after 29, then repeat: 295 / 51

Moving on to step 6:
When dividing 295 by 51, we get 5 with a remainder of 40.
Record the quotient 5 as the next digit in the result. 
Result so far: 16895.0
Deduct 255 from 295 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 7:
If we divide 400 by 51, we get 7 and a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 16895.7
If we subtract 357 from 400, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 8:
51 can be fit into 430 8 times, resulting in a remainder of 22.
The next digit of our result is 8. 
Result so far: 16895.78
Subtracting 408 from 430 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 9:
51 can be fit into 220 4 times, resulting in a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 16895.784
The remainder is 16 after subtracting 204 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
The number 51 fits into 160 3 times, leaving a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 16895.7843
Deduct 153 from 160 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 11:
If we divide 70 by 51, we get 1 and a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 16895.78431
If we take 51 away from 70, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 12:
If we divide 190 by 51, we get 3 and a remainder of 37.
Write down 3 as next digit of the result. 
Result so far: 16895.784313
If we take 153 away from 190, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 13:
The number 51 fits into 370 7 times, leaving a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 16895.7843137
The remainder is 13 after subtracting 357 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 14:
The number 51 fits into 130 2 times, leaving a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 16895.78431372
If we subtract 102 from 130, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Our division results in 16895.78431372 with a remaining 2.8e-08.