We're dividing 640643 by 52 
We want to divide 640643 by 52.

Moving on to step 1:
52 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 52

Going ahead to step 2:
When dividing 64 by 52, we get 1 with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 52 from 64 and we're left with 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 52

Going ahead to step 3:
52 can be fit into 120 2 times, resulting in a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 104 from 120 and we're left with 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 52

Moving on to step 4:
166 divided by 52 is 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 123.0
Deduct 156 from 166 and we're left with 10.
Bring next digit (4) of the dividend behind the 10 and repeat the process: 104 / 52

Moving on to step 5:
52 can be fit into 104 2 times, resulting in a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 1232.0
If we subtract 104 from 104, we get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 52

Step 6:
If we divide 3 by 52, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 12320.0
The remainder is 3 after subtracting 0 from 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
52 goes into 30 0 times with a remainder of 30.
The next digit of our result is 0. 
Result so far: 12320.0
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
The number 52 fits into 300 5 times, leaving a remainder of 40.
Put 5 as the next digit of the answer. 
Result so far: 12320.05
If we take 260 away from 300, we end up 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 9:
400 divided by 52 is 7 with a remainder of 36.
Write down 7 as next digit of the result. 
Result so far: 12320.057
Subtracting 364 from 400 leaves us with 36.
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 10:
The number 52 fits into 360 6 times, leaving a remainder of 48.
The next digit of our result is 6. 
Result so far: 12320.0576
Deduct 312 from 360 and we're left 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.

On to step 11:
If we divide 480 by 52, we get 9 and a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 12320.05769
If we take 468 away from 480, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 12:
If we divide 120 by 52, we get 2 and a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 12320.057692
If we take 104 away from 120, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
52 goes into 160 3 times with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 12320.0576923
If we subtract 156 from 160, we get 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 14:
52 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 12320.0576923
Deduct 0 from 40 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.

After the division, we end up with 12320.0576923 and a remainder of 4e-08.