We divide 399685 by 10
Let's see how many times 10 fits into 399685.

Advancing to step 1:
3 divided by 10 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 10

Going ahead 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
Subtract 30 from 39 to get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 10

Advancing to step 3:
If we divide 99 by 10, we get 9 and a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Subtracting 90 from 99 leaves us with 9.
Append the next digit (6) from the dividend to 9 and continue with: 96 / 10

Let's proceed to step 4:
96 divided by 10 is 9 with a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 399.0
If we subtract 90 from 96, we get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 10

On to step 5:
When dividing 68 by 10, we get 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 3996.0
Deduct 60 from 68 and we're left with 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 10

Let's proceed to step 6:
10 goes into 85 8 times with a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 39968.0
If we subtract 80 from 85, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
The number 10 fits into 50 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 39968.5
If we subtract 50 from 50, 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.

Let's proceed to step 8:
0 divided by 10 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 39968.5
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.

Advancing to step 9:
10 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 39968.5
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.

The quotient of the division is 39968.5, and the remainder is 0.0.