We're dividing 645352 by 51 
We're looking to find how many times 51 goes into 645352.

Moving on to step 1:
51 can be fit into 6 0 times, resulting in 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.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 51

Going ahead to step 2:
51 goes into 64 1 times with a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 51 from 64, we get 13.
Bring next digit (5) of the dividend behind the 13 and repeat the process: 135 / 51

Let's proceed to step 3:
The number 51 fits into 135 2 times, leaving a remainder of 33.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 102 from 135 and we're left with 33.
Take the next digit (3) from the dividend and append it to 33, then repeat: 333 / 51

Moving on to step 4:
The number 51 fits into 333 6 times, leaving a remainder of 27.
Write down 6 as next digit of the result. 
Result so far: 126.0
Subtract 306 from 333 to get 27.
Bring next digit (5) of the dividend behind the 27 and repeat the process: 275 / 51

Moving on to step 5:
51 can be fit into 275 5 times, resulting in a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 1265.0
If we take 255 away from 275, we end up with 20.
Append the next digit (2) from the dividend to 20 and continue with: 202 / 51

Going ahead to step 6:
51 goes into 202 3 times with a remainder of 49.
The next digit of our result is 3. 
Result so far: 12653.0
Subtract 153 from 202 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 7:
The number 51 fits into 490 9 times, leaving a remainder of 31.
Put 9 as the next digit of the answer. 
Result so far: 12653.9
Subtracting 459 from 490 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 8:
51 can be fit into 310 6 times, resulting in a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 12653.96
If we take 306 away from 310, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 9:
When dividing 40 by 51, we get 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 12653.96
Subtracting 0 from 40 leaves us 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.

Advancing to step 10:
When dividing 400 by 51, we get 7 with a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 12653.9607
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 11:
When dividing 430 by 51, we get 8 with a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 12653.96078
Deduct 408 from 430 and we're left 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.

On to step 12:
220 divided by 51 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 12653.960784
If we subtract 204 from 220, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 13:
51 goes into 160 3 times with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 12653.9607843
Subtract 153 from 160 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 14:
The number 51 fits into 70 1 times, leaving a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 12653.96078431
The remainder is 19 after subtracting 51 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

After the division, we end up with 12653.96078431 and a remainder of 1.9e-08.