We divide 864240 by 72
We want to divide 864240 by 72.

Step 1:
The number 72 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 72

Let's proceed to step 2:
When dividing 86 by 72, we get 1 with a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 72 from 86 to get 14.
Include the next digit (4) from the dividend after 14, then repeat: 144 / 72

Going ahead to step 3:
If we divide 144 by 72, we get 2 and a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 144 from 144 and we're left with 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 72

Advancing to step 4:
72 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 120.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 72

Moving on to step 5:
If we divide 24 by 72, we get 0 and a remainder of 24.
The next digit of our result is 0. 
Result so far: 1200.0
If we subtract 0 from 24, we get 24.
Append the next digit (0) from the dividend to 24 and continue with: 240 / 72

On to step 6:
If we divide 240 by 72, we get 3 and a remainder of 24.
The next digit of our result is 3. 
Result so far: 12003.0
Subtracting 216 from 240 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 7:
72 goes into 240 3 times with a remainder of 24.
Record the quotient 3 as the next digit in the result. 
Result so far: 12003.3
The remainder is 24 after subtracting 216 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 8:
When dividing 240 by 72, we get 3 with a remainder of 24.
The number 3 becomes the next digit in our result. 
Result so far: 12003.33
If we subtract 216 from 240, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 12003.33 with a remainder of 0.024.