We're dividing 640273 by 80 
Our goal is to divide 640273 by 80.

On to step 1:
80 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 80

Step 2:
80 can be fit into 64 0 times, resulting in a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Fetch the next digit (0) from the dividend, attach it to 64 and continue: 640 / 80

Advancing to step 3:
80 can be fit into 640 8 times, resulting in a remainder of 0.
The next digit of our result is 8. 
Result so far: 8.0
If we subtract 640 from 640, we get 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 80

Let's proceed to step 4:
80 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 80.0
If we take 0 away from 2, we end up with 2.
Include the next digit (7) from the dividend after 2, then repeat: 27 / 80

Let's proceed to step 5:
80 can be fit into 27 0 times, resulting in a remainder of 27.
Use 0 as the next digit of our solution. 
Result so far: 800.0
If we take 0 away from 27, we end up with 27.
Append the next digit (3) from the dividend to 27 and continue with: 273 / 80

On to step 6:
The number 80 fits into 273 3 times, leaving a remainder of 33.
Write down 3 as next digit of the result. 
Result so far: 8003.0
Deduct 240 from 273 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.

On to step 7:
The number 80 fits into 330 4 times, leaving a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 8003.4
Subtract 320 from 330 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
80 can be fit into 100 1 times, resulting in a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 8003.41
Subtracting 80 from 100 leaves us 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 9:
When dividing 200 by 80, we get 2 with a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 8003.412
Deduct 160 from 200 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.

Advancing to step 10:
80 goes into 400 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 8003.4125
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.

Advancing to step 11:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 8003.4125
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:
If we divide 0 by 80, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8003.4125
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 8003.4125 with a remainder of 0.0.