We're dividing 643563 by 80 
We want to divide 643563 by 80.

On to step 1:
If we divide 6 by 80, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 80

Let's proceed to step 2:
64 divided by 80 is 0 with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Include the next digit (3) from the dividend after 64, then repeat: 643 / 80

Step 3:
If we divide 643 by 80, we get 8 and a remainder of 3.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtract 640 from 643 to get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 80

Moving on to step 4:
When dividing 35 by 80, we get 0 with a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 80.0
The remainder is 35 after subtracting 0 from 35.
Take the next digit (6) from the dividend and append it to 35, then repeat: 356 / 80

Step 5:
356 divided by 80 is 4 with a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 804.0
Deduct 320 from 356 and we're left with 36.
Append the next digit (3) from the dividend to 36 and continue with: 363 / 80

Advancing to step 6:
80 goes into 363 4 times with a remainder of 43.
Put 4 as the next digit of the answer. 
Result so far: 8044.0
Subtracting 320 from 363 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 7:
80 goes into 430 5 times with a remainder of 30.
The next digit of our result is 5. 
Result so far: 8044.5
If we subtract 400 from 430, 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.

Going ahead to step 8:
80 goes into 300 3 times with a remainder of 60.
Write down 3 as next digit of the result. 
Result so far: 8044.53
The remainder is 60 after subtracting 240 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 9:
If we divide 600 by 80, we get 7 and a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 8044.537
If we take 560 away from 600, 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.

Let's proceed to step 10:
80 can be fit into 400 5 times, resulting in a remainder of 0.
The next digit of our result is 5. 
Result so far: 8044.5375
Deduct 400 from 400 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8044.5375
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 12:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 8044.5375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 8044.5375 with a remaining 0.0.