We're dividing 869712 by 51 
We want to divide 869712 by 51.

Advancing to step 1:
If we divide 8 by 51, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 51

Moving on to step 2:
86 divided by 51 is 1 with a remainder of 35.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 51 from 86 to get 35.
Include the next digit (9) from the dividend after 35, then repeat: 359 / 51

Let's proceed to step 3:
51 can be fit into 359 7 times, resulting in a remainder of 2.
The next digit of our result is 7. 
Result so far: 17.0
If we subtract 357 from 359, we get 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 51

On to step 4:
If we divide 27 by 51, we get 0 and a remainder of 27.
Write down 0 as next digit of the result. 
Result so far: 170.0
Subtract 0 from 27 to get 27.
Grab the next digit (1) from the dividend, add it to 27, then carry on: 271 / 51

Advancing to step 5:
When dividing 271 by 51, we get 5 with a remainder of 16.
Record the quotient 5 as the next digit in the result. 
Result so far: 1705.0
Deduct 255 from 271 and we're left with 16.
Include the next digit (2) from the dividend after 16, then repeat: 162 / 51

Advancing to step 6:
If we divide 162 by 51, we get 3 and a remainder of 9.
The next digit of our result is 3. 
Result so far: 17053.0
If we subtract 153 from 162, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
The number 51 fits into 90 1 times, leaving a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 17053.1
If we subtract 51 from 90, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 8:
51 goes into 390 7 times with a remainder of 33.
Write down 7 as next digit of the result. 
Result so far: 17053.17
Deduct 357 from 390 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 9:
51 can be fit into 330 6 times, resulting in a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 17053.176
The remainder is 24 after subtracting 306 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 10:
When dividing 240 by 51, we get 4 with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 17053.1764
The remainder is 36 after subtracting 204 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
360 divided by 51 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 17053.17647
If we subtract 357 from 360, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 12:
51 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 17053.17647
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 13:
51 can be fit into 300 5 times, resulting in a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 17053.1764705
If we take 255 away from 300, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 14:
The number 51 fits into 450 8 times, leaving a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 17053.17647058
Subtract 408 from 450 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

After the division, we end up with 17053.17647058 and a remainder of 4.2e-08.