We're dividing 638620 by 80 
Our goal is to divide 638620 by 80.

Moving on to step 1:
The number 80 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 80

On to step 2:
If we divide 63 by 80, we get 0 and a remainder of 63.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 63, we get 63.
Fetch the next digit (8) from the dividend, attach it to 63 and continue: 638 / 80

Let's proceed to step 3:
80 goes into 638 7 times with a remainder of 78.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Deduct 560 from 638 and we're left with 78.
Grab the next digit (6) from the dividend, add it to 78, then carry on: 786 / 80

On to step 4:
The number 80 fits into 786 9 times, leaving a remainder of 66.
Use 9 as the next digit of our solution. 
Result so far: 79.0
Deduct 720 from 786 and we're left with 66.
Take the next digit (2) from the dividend and append it to 66, then repeat: 662 / 80

Going ahead to step 5:
The number 80 fits into 662 8 times, leaving a remainder of 22.
The number 8 becomes the next digit in our result. 
Result so far: 798.0
Deduct 640 from 662 and we're left with 22.
Fetch the next digit (0) from the dividend, attach it to 22 and continue: 220 / 80

Going ahead to step 6:
If we divide 220 by 80, we get 2 and a remainder of 60.
Put 2 as the next digit of the answer. 
Result so far: 7982.0
Subtracting 160 from 220 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 7:
80 goes into 600 7 times with a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 7982.7
Subtracting 560 from 600 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.

Going ahead to step 8:
When dividing 400 by 80, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 7982.75
Subtract 400 from 400 to 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.

Step 9:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 7982.75
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.

On to step 10:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 7982.75
Subtract 0 from 0 to 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.

After the division, we end up with 7982.75 and a remainder of 0.0.