630857 ÷ 51 
Our goal is to divide 630857 by 51.

Advancing to step 1:
51 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 51

Let's proceed to step 2:
51 goes into 63 1 times with a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 51 from 63 leaves us with 12.
Bring next digit (0) of the dividend behind the 12 and repeat the process: 120 / 51

Advancing to step 3:
51 can be fit into 120 2 times, resulting in a remainder of 18.
The next digit of our result is 2. 
Result so far: 12.0
If we take 102 away from 120, we end up with 18.
Fetch the next digit (8) from the dividend, attach it to 18 and continue: 188 / 51

On to step 4:
188 divided by 51 is 3 with a remainder of 35.
Use 3 as the next digit of our solution. 
Result so far: 123.0
If we take 153 away from 188, we end up with 35.
Grab the next digit (5) from the dividend, add it to 35, then carry on: 355 / 51

On to step 5:
When dividing 355 by 51, we get 6 with a remainder of 49.
Record the quotient 6 as the next digit in the result. 
Result so far: 1236.0
If we take 306 away from 355, we end up with 49.
Include the next digit (7) from the dividend after 49, then repeat: 497 / 51

Let's proceed to step 6:
497 divided by 51 is 9 with a remainder of 38.
Use 9 as the next digit of our solution. 
Result so far: 12369.0
Subtracting 459 from 497 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 7:
51 goes into 380 7 times with a remainder of 23.
Use 7 as the next digit of our solution. 
Result so far: 12369.7
If we take 357 away from 380, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 8:
If we divide 230 by 51, we get 4 and a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 12369.74
Deduct 204 from 230 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 9:
If we divide 260 by 51, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 12369.745
If we take 255 away from 260, we end up 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 10:
When dividing 50 by 51, we get 0 with a remainder of 50.
The next digit of our result is 0. 
Result so far: 12369.745
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 11:
The number 51 fits into 500 9 times, leaving a remainder of 41.
The number 9 becomes the next digit in our result. 
Result so far: 12369.74509
The remainder is 41 after subtracting 459 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 12:
When dividing 410 by 51, we get 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 12369.745098
If we take 408 away from 410, we end up 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.

Step 13:
If we divide 20 by 51, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 12369.745098
Deduct 0 from 20 and we're left 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.

Moving on to step 14:
51 can be fit into 200 3 times, resulting in a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 12369.74509803
Deduct 153 from 200 and we're left 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.

The final result is 12369.74509803 with a remainder of 4.7e-08.