399544 divided by 24 
We want to figure out the number of times 399544 can be divided by 24.

Advancing to step 1:
When dividing 3 by 24, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 24

Moving on to step 2:
The number 24 fits into 39 1 times, leaving a remainder of 15.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 24 from 39 to get 15.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 24

Moving on to step 3:
24 goes into 159 6 times with a remainder of 15.
Use 6 as the next digit of our solution. 
Result so far: 16.0
Deduct 144 from 159 and we're left with 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 24

Moving on to step 4:
24 can be fit into 155 6 times, resulting in a remainder of 11.
The number 6 becomes the next digit in our result. 
Result so far: 166.0
If we subtract 144 from 155, we get 11.
Grab the next digit (4) from the dividend, add it to 11, then carry on: 114 / 24

Advancing to step 5:
24 goes into 114 4 times with a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 1664.0
If we take 96 away from 114, we end up with 18.
Fetch the next digit (4) from the dividend, attach it to 18 and continue: 184 / 24

On to step 6:
The number 24 fits into 184 7 times, leaving a remainder of 16.
The next digit of our result is 7. 
Result so far: 16647.0
If we subtract 168 from 184, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 7:
The number 24 fits into 160 6 times, leaving a remainder of 16.
The next digit of our result is 6. 
Result so far: 16647.6
If we take 144 away from 160, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 8:
If we divide 160 by 24, we get 6 and a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 16647.66
Subtract 144 from 160 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

In conclusion, the division gives 16647.66 with a balance of 0.016.