We're dividing 99135 by 80 
We want to figure out the number of times 99135 can be divided by 80.

Going ahead to step 1:
80 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 80

On to step 2:
The number 80 fits into 99 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 19 after subtracting 80 from 99.
Append the next digit (1) from the dividend to 19 and continue with: 191 / 80

Step 3:
80 can be fit into 191 2 times, resulting in a remainder of 31.
The next digit of our result is 2. 
Result so far: 12.0
Deduct 160 from 191 and we're left with 31.
Bring next digit (3) of the dividend behind the 31 and repeat the process: 313 / 80

Moving on to step 4:
The number 80 fits into 313 3 times, leaving a remainder of 73.
The number 3 becomes the next digit in our result. 
Result so far: 123.0
Subtract 240 from 313 to get 73.
Take the next digit (5) from the dividend and append it to 73, then repeat: 735 / 80

Advancing to step 5:
When dividing 735 by 80, we get 9 with a remainder of 15.
Use 9 as the next digit of our solution. 
Result so far: 1239.0
Subtract 720 from 735 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 6:
80 goes into 150 1 times with a remainder of 70.
Write down 1 as next digit of the result. 
Result so far: 1239.1
Deduct 80 from 150 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 7:
The number 80 fits into 700 8 times, leaving a remainder of 60.
The next digit of our result is 8. 
Result so far: 1239.18
Subtract 640 from 700 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 8:
If we divide 600 by 80, we get 7 and a remainder of 40.
The next digit of our result is 7. 
Result so far: 1239.187
Deduct 560 from 600 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
When dividing 400 by 80, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 1239.1875
The remainder is 0 after subtracting 400 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
80 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1239.1875
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
80 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1239.1875
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 1239.1875, and the remainder is 0.0.