Let's divide 86129 by 99
We want to divide 86129 by 99.

Going ahead to step 1:
When dividing 8 by 99, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 99

On to step 2:
When dividing 86 by 99, we get 0 with a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 99

Let's proceed to step 3:
861 divided by 99 is 8 with a remainder of 69.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 792 from 861 to get 69.
Append the next digit (2) from the dividend to 69 and continue with: 692 / 99

Advancing to step 4:
99 goes into 692 6 times with a remainder of 98.
The next digit of our result is 6. 
Result so far: 86.0
Deduct 594 from 692 and we're left with 98.
Bring next digit (9) of the dividend behind the 98 and repeat the process: 989 / 99

Going ahead to step 5:
989 divided by 99 is 9 with a remainder of 98.
Use 9 as the next digit of our solution. 
Result so far: 869.0
Subtract 891 from 989 to get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Going ahead to step 6:
99 can be fit into 980 9 times, resulting in a remainder of 89.
Use 9 as the next digit of our solution. 
Result so far: 869.9
If we take 891 away from 980, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Advancing to step 7:
99 can be fit into 890 8 times, resulting in a remainder of 98.
Put 8 as the next digit of the answer. 
Result so far: 869.98
Subtract 792 from 890 to get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Moving on to step 8:
If we divide 980 by 99, we get 9 and a remainder of 89.
Use 9 as the next digit of our solution. 
Result so far: 869.989
If we subtract 891 from 980, we get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 9:
When dividing 890 by 99, we get 8 with a remainder of 98.
Use 8 as the next digit of our solution. 
Result so far: 869.9898
The remainder is 98 after subtracting 792 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Going ahead to step 10:
99 can be fit into 980 9 times, resulting in a remainder of 89.
The number 9 becomes the next digit in our result. 
Result so far: 869.98989
Subtract 891 from 980 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 11:
99 goes into 890 8 times with a remainder of 98.
Put 8 as the next digit of the answer. 
Result so far: 869.989898
The remainder is 98 after subtracting 792 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

On to step 12:
980 divided by 99 is 9 with a remainder of 89.
Put 9 as the next digit of the answer. 
Result so far: 869.9898989
If we take 891 away from 980, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 13:
If we divide 890 by 99, we get 8 and a remainder of 98.
Put 8 as the next digit of the answer. 
Result so far: 869.98989898
Deduct 792 from 890 and we're left with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

In conclusion, the division gives 869.98989898 with a balance of 9.8e-08.