390001 ÷ 80 
Our goal is to divide 390001 by 80.

Moving on to step 1:
80 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 80

Going ahead to step 2:
If we divide 39 by 80, we get 0 and a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Bring next digit (0) of the dividend behind the 39 and repeat the process: 390 / 80

Going ahead to step 3:
80 can be fit into 390 4 times, resulting in a remainder of 70.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 70 after subtracting 320 from 390.
Include the next digit (0) from the dividend after 70, then repeat: 700 / 80

Let's proceed to step 4:
80 goes into 700 8 times with a remainder of 60.
Write down 8 as next digit of the result. 
Result so far: 48.0
Subtract 640 from 700 to get 60.
Take the next digit (0) from the dividend and append it to 60, then repeat: 600 / 80

Advancing to step 5:
80 goes into 600 7 times with a remainder of 40.
Write down 7 as next digit of the result. 
Result so far: 487.0
If we subtract 560 from 600, we get 40.
Fetch the next digit (1) from the dividend, attach it to 40 and continue: 401 / 80

Let's proceed to step 6:
When dividing 401 by 80, we get 5 with a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 4875.0
If we subtract 400 from 401, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
When dividing 10 by 80, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 4875.0
If we subtract 0 from 10, we 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.

Step 8:
When dividing 100 by 80, we get 1 with a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 4875.01
Subtract 80 from 100 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
When dividing 200 by 80, we get 2 with a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 4875.012
If we subtract 160 from 200, we get 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 10:
When dividing 400 by 80, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 4875.0125
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.

Moving on to step 11:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 4875.0125
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.

Moving on to step 12:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 4875.0125
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.

The final result is 4875.0125 with a remainder of 0.0.