724399 ÷ 10 
Our goal is to divide 724399 by 10.

Step 1:
7 divided by 10 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 10

Advancing to step 2:
The number 10 fits into 72 7 times, leaving a remainder of 2.
The next digit of our result is 7. 
Result so far: 7.0
If we take 70 away from 72, we end up with 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 10

Moving on to step 3:
10 goes into 24 2 times with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 72.0
Deduct 20 from 24 and we're left with 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 10

Let's proceed to step 4:
When dividing 43 by 10, we get 4 with a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 724.0
If we take 40 away from 43, we end up with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 10

Moving on to step 5:
39 divided by 10 is 3 with a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 7243.0
Subtract 30 from 39 to get 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 10

Moving on to step 6:
If we divide 99 by 10, we get 9 and a remainder of 9.
The next digit of our result is 9. 
Result so far: 72439.0
Deduct 90 from 99 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
The number 10 fits into 90 9 times, leaving a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 72439.9
Deduct 90 from 90 and we're left 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 8:
0 divided by 10 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 72439.9
Subtract 0 from 0 to 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 9:
When dividing 0 by 10, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 72439.9
Deduct 0 from 0 and we're left 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.

The final outcome is 72439.9, with a leftover of 0.0.