We're dividing 812900 by 99 
We're looking to find how many times 99 goes into 812900.

Moving on to step 1:
8 divided by 99 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 99

Advancing to step 2:
99 can be fit into 81 0 times, resulting in a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Bring next digit (2) of the dividend behind the 81 and repeat the process: 812 / 99

Going ahead to step 3:
The number 99 fits into 812 8 times, leaving a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 792 away from 812, we end up with 20.
Append the next digit (9) from the dividend to 20 and continue with: 209 / 99

Going ahead to step 4:
When dividing 209 by 99, we get 2 with a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 82.0
If we subtract 198 from 209, we get 11.
Include the next digit (0) from the dividend after 11, then repeat: 110 / 99

Going ahead to step 5:
The number 99 fits into 110 1 times, leaving a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 821.0
Deduct 99 from 110 and we're left with 11.
Fetch the next digit (0) from the dividend, attach it to 11 and continue: 110 / 99

Advancing to step 6:
110 divided by 99 is 1 with a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 8211.0
Deduct 99 from 110 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
110 divided by 99 is 1 with a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 8211.1
Subtract 99 from 110 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 8:
When dividing 110 by 99, we get 1 with a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 8211.11
Subtract 99 from 110 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Our division results in 8211.11 with a remaining 0.011.