399120 ÷ 50 
We want to figure out the number of times 399120 can be divided by 50.

Moving on to step 1:
50 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 50

Let's proceed to step 2:
50 can be fit into 39 0 times, resulting in a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Append the next digit (9) from the dividend to 39 and continue with: 399 / 50

Step 3:
50 goes into 399 7 times with a remainder of 49.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 350 away from 399, we end up with 49.
Grab the next digit (1) from the dividend, add it to 49, then carry on: 491 / 50

On to step 4:
491 divided by 50 is 9 with a remainder of 41.
The next digit of our result is 9. 
Result so far: 79.0
If we subtract 450 from 491, we get 41.
Include the next digit (2) from the dividend after 41, then repeat: 412 / 50

Advancing to step 5:
50 can be fit into 412 8 times, resulting in a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 798.0
Subtract 400 from 412 to get 12.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 50

On to step 6:
50 can be fit into 120 2 times, resulting in a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 7982.0
The remainder is 20 after subtracting 100 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 7:
The number 50 fits into 200 4 times, leaving a remainder of 0.
The next digit of our result is 4. 
Result so far: 7982.4
Subtracting 200 from 200 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.

Moving on to step 8:
50 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 7982.4
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.

Let's proceed to step 9:
The number 50 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 7982.4
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.

Our division results in 7982.4 with a remaining 0.0.