We're dividing 399820 by 10 
Let's see how many times 10 fits into 399820.

Going ahead to step 1:
The number 10 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
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 / 10

Let's proceed to step 2:
The number 10 fits into 39 3 times, leaving a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 30 from 39 leaves us with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 10

Advancing to step 3:
99 divided by 10 is 9 with a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
Deduct 90 from 99 and we're left with 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 10

Let's proceed to step 4:
If we divide 98 by 10, we get 9 and a remainder of 8.
The next digit of our result is 9. 
Result so far: 399.0
The remainder is 8 after subtracting 90 from 98.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 10

On to step 5:
82 divided by 10 is 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 3998.0
If we take 80 away from 82, we end up with 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 10

On to step 6:
20 divided by 10 is 2 with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 39982.0
If we take 20 away from 20, 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.

Advancing to step 7:
0 divided by 10 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 39982.0
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.

Advancing to step 8:
The number 10 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 39982.0
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.

After the division, we end up with 39982.0 and a remainder of 0.0.