We look at the division of 864403 by 72 
We want to figure out the number of times 864403 can be divided by 72.

Let's proceed to step 1:
8 divided by 72 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
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

Advancing to step 2:
When dividing 86 by 72, we get 1 with a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 72 from 86 to get 14.
Append the next digit (4) from the dividend to 14 and continue with: 144 / 72

Let's proceed to step 3:
72 goes into 144 2 times with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we take 144 away from 144, we end up with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 72

Moving on to step 4:
4 divided by 72 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 120.0
If we take 0 away from 4, we end up with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 72

Step 5:
When dividing 40 by 72, we get 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 1200.0
If we subtract 0 from 40, we get 40.
Take the next digit (3) from the dividend and append it to 40, then repeat: 403 / 72

On to step 6:
The number 72 fits into 403 5 times, leaving a remainder of 43.
The number 5 becomes the next digit in our result. 
Result so far: 12005.0
Deduct 360 from 403 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 7:
430 divided by 72 is 5 with a remainder of 70.
The number 5 becomes the next digit in our result. 
Result so far: 12005.5
If we subtract 360 from 430, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
72 goes into 700 9 times with a remainder of 52.
The number 9 becomes the next digit in our result. 
Result so far: 12005.59
If we take 648 away from 700, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 9:
72 goes into 520 7 times with a remainder of 16.
Write down 7 as next digit of the result. 
Result so far: 12005.597
Subtract 504 from 520 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.

Step 10:
160 divided by 72 is 2 with a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 12005.5972
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.

Going ahead to step 11:
If we divide 160 by 72, we get 2 and a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 12005.59722
The remainder is 16 after subtracting 144 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

After the division, we end up with 12005.59722 and a remainder of 1.6e-05.