We look at the division of 72108289 by 864 
We want to divide 72108289 by 864.

Going ahead to step 1:
If we divide 7 by 864, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 864

Step 2:
When dividing 72 by 864, we get 0 with a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 72, we get 72.
Take the next digit (1) from the dividend and append it to 72, then repeat: 721 / 864

Let's proceed to step 3:
864 can be fit into 721 0 times, resulting in a remainder of 721.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 721 after subtracting 0 from 721.
Grab the next digit (0) from the dividend, add it to 721, then carry on: 7210 / 864

Moving on to step 4:
When dividing 7210 by 864, we get 8 with a remainder of 298.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 6912 from 7210, we get 298.
Fetch the next digit (8) from the dividend, attach it to 298 and continue: 2988 / 864

Advancing to step 5:
The number 864 fits into 2988 3 times, leaving a remainder of 396.
Use 3 as the next digit of our solution. 
Result so far: 83.0
Subtract 2592 from 2988 to get 396.
Grab the next digit (2) from the dividend, add it to 396, then carry on: 3962 / 864

Going ahead to step 6:
864 goes into 3962 4 times with a remainder of 506.
Record the quotient 4 as the next digit in the result. 
Result so far: 834.0
Deduct 3456 from 3962 and we're left with 506.
Include the next digit (8) from the dividend after 506, then repeat: 5068 / 864

Step 7:
864 can be fit into 5068 5 times, resulting in a remainder of 748.
Record the quotient 5 as the next digit in the result. 
Result so far: 8345.0
Deduct 4320 from 5068 and we're left with 748.
Append the next digit (9) from the dividend to 748 and continue with: 7489 / 864

On to step 8:
The number 864 fits into 7489 8 times, leaving a remainder of 577.
Write down 8 as next digit of the result. 
Result so far: 83458.0
The remainder is 577 after subtracting 6912 from 7489.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Going ahead to step 9:
If we divide 5770 by 864, we get 6 and a remainder of 586.
Record the quotient 6 as the next digit in the result. 
Result so far: 83458.6
If we subtract 5184 from 5770, we get 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

On to step 10:
864 goes into 5860 6 times with a remainder of 676.
Write down 6 as next digit of the result. 
Result so far: 83458.66
Deduct 5184 from 5860 and we're left with 676.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

After the division, we end up with 83458.66 and a remainder of 0.676.