We're dividing 88339259 by 999 
Our goal is to divide 88339259 by 999.

Advancing to step 1:
When dividing 8 by 999, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (8) from the dividend after 8, then repeat: 88 / 999

Step 2:
If we divide 88 by 999, we get 0 and a remainder of 88.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 88 and we're left with 88.
Bring next digit (3) of the dividend behind the 88 and repeat the process: 883 / 999

Moving on to step 3:
999 goes into 883 0 times with a remainder of 883.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 883 to get 883.
Include the next digit (3) from the dividend after 883, then repeat: 8833 / 999

Step 4:
If we divide 8833 by 999, we get 8 and a remainder of 841.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 7992 from 8833, we get 841.
Append the next digit (9) from the dividend to 841 and continue with: 8419 / 999

On to step 5:
999 can be fit into 8419 8 times, resulting in a remainder of 427.
The next digit of our result is 8. 
Result so far: 88.0
If we subtract 7992 from 8419, we get 427.
Bring next digit (2) of the dividend behind the 427 and repeat the process: 4272 / 999

Going ahead to step 6:
If we divide 4272 by 999, we get 4 and a remainder of 276.
Record the quotient 4 as the next digit in the result. 
Result so far: 884.0
Subtracting 3996 from 4272 leaves us with 276.
Bring next digit (5) of the dividend behind the 276 and repeat the process: 2765 / 999

Going ahead to step 7:
2765 divided by 999 is 2 with a remainder of 767.
Use 2 as the next digit of our solution. 
Result so far: 8842.0
Subtracting 1998 from 2765 leaves us with 767.
Append the next digit (9) from the dividend to 767 and continue with: 7679 / 999

Step 8:
999 can be fit into 7679 7 times, resulting in a remainder of 686.
Use 7 as the next digit of our solution. 
Result so far: 88427.0
The remainder is 686 after subtracting 6993 from 7679.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6860, and continue the process.

Let's proceed to step 9:
999 can be fit into 6860 6 times, resulting in a remainder of 866.
Use 6 as the next digit of our solution. 
Result so far: 88427.6
The remainder is 866 after subtracting 5994 from 6860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8660, and continue the process.

Going ahead to step 10:
The number 999 fits into 8660 8 times, leaving a remainder of 668.
Record the quotient 8 as the next digit in the result. 
Result so far: 88427.68
If we subtract 7992 from 8660, we get 668.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6680, and continue the process.

Advancing to step 11:
999 can be fit into 6680 6 times, resulting in a remainder of 686.
Write down 6 as next digit of the result. 
Result so far: 88427.686
Subtract 5994 from 6680 to get 686.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6860, and continue the process.

Moving on to step 12:
999 goes into 6860 6 times with a remainder of 866.
The number 6 becomes the next digit in our result. 
Result so far: 88427.6866
Subtracting 5994 from 6860 leaves us with 866.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8660, and continue the process.

The final outcome is 88427.6866, with a leftover of 0.00866.