We're dividing 638435 by 80 
Our goal is to divide 638435 by 80.

Step 1:
6 divided by 80 is 0 with 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.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 80

Let's proceed to step 2:
If we divide 63 by 80, we get 0 and a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Fetch the next digit (8) from the dividend, attach it to 63 and continue: 638 / 80

Let's proceed to step 3:
When dividing 638 by 80, we get 7 with a remainder of 78.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 78 after subtracting 560 from 638.
Fetch the next digit (4) from the dividend, attach it to 78 and continue: 784 / 80

Advancing to step 4:
784 divided by 80 is 9 with a remainder of 64.
The next digit of our result is 9. 
Result so far: 79.0
Deduct 720 from 784 and we're left with 64.
Include the next digit (3) from the dividend after 64, then repeat: 643 / 80

Advancing to step 5:
80 can be fit into 643 8 times, resulting in a remainder of 3.
The next digit of our result is 8. 
Result so far: 798.0
If we subtract 640 from 643, we get 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 80

Let's proceed to step 6:
35 divided by 80 is 0 with a remainder of 35.
Record the quotient 0 as the next digit in the result. 
Result so far: 7980.0
If we subtract 0 from 35, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 7:
80 can be fit into 350 4 times, resulting in a remainder of 30.
Use 4 as the next digit of our solution. 
Result so far: 7980.4
The remainder is 30 after subtracting 320 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 8:
300 divided by 80 is 3 with a remainder of 60.
The next digit of our result is 3. 
Result so far: 7980.43
If we take 240 away from 300, we end up 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 9:
The number 80 fits into 600 7 times, leaving a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 7980.437
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.

On to step 10:
The number 80 fits into 400 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 7980.4375
If we subtract 400 from 400, 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.

Going ahead to step 11:
0 divided by 80 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 7980.4375
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:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 7980.4375
Subtracting 0 from 0 leaves us 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.

After the division, we end up with 7980.4375 and a remainder of 0.0.