We look at the division of 99297789 by 864 
We're looking to find how many times 864 goes into 99297789.

Moving on to step 1:
864 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 864

Moving on to step 2:
When dividing 99 by 864, we get 0 with a remainder of 99.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Include the next digit (2) from the dividend after 99, then repeat: 992 / 864

Advancing to step 3:
992 divided by 864 is 1 with a remainder of 128.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 864 from 992 leaves us with 128.
Fetch the next digit (9) from the dividend, attach it to 128 and continue: 1289 / 864

Step 4:
When dividing 1289 by 864, we get 1 with a remainder of 425.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtract 864 from 1289 to get 425.
Grab the next digit (7) from the dividend, add it to 425, then carry on: 4257 / 864

Moving on to step 5:
864 can be fit into 4257 4 times, resulting in a remainder of 801.
Put 4 as the next digit of the answer. 
Result so far: 114.0
The remainder is 801 after subtracting 3456 from 4257.
Grab the next digit (7) from the dividend, add it to 801, then carry on: 8017 / 864

Step 6:
864 goes into 8017 9 times with a remainder of 241.
Record the quotient 9 as the next digit in the result. 
Result so far: 1149.0
Subtracting 7776 from 8017 leaves us with 241.
Append the next digit (8) from the dividend to 241 and continue with: 2418 / 864

Moving on to step 7:
The number 864 fits into 2418 2 times, leaving a remainder of 690.
The number 2 becomes the next digit in our result. 
Result so far: 11492.0
Subtract 1728 from 2418 to get 690.
Include the next digit (9) from the dividend after 690, then repeat: 6909 / 864

Advancing to step 8:
864 goes into 6909 7 times with a remainder of 861.
Write down 7 as next digit of the result. 
Result so far: 114927.0
If we take 6048 away from 6909, we end up with 861.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8610, and continue the process.

Going ahead to step 9:
When dividing 8610 by 864, we get 9 with a remainder of 834.
Write down 9 as next digit of the result. 
Result so far: 114927.9
Subtract 7776 from 8610 to get 834.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8340, and continue the process.

Let's proceed to step 10:
When dividing 8340 by 864, we get 9 with a remainder of 564.
Put 9 as the next digit of the answer. 
Result so far: 114927.99
Subtracting 7776 from 8340 leaves us with 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

The final result is 114927.99 with a remainder of 0.564.