Let's divide 99543634 by 80
We want to divide 99543634 by 80.

On to step 1:
80 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 80

Step 2:
The number 80 fits into 99 1 times, leaving a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 80 from 99, we get 19.
Include the next digit (5) from the dividend after 19, then repeat: 195 / 80

Moving on to step 3:
If we divide 195 by 80, we get 2 and a remainder of 35.
The next digit of our result is 2. 
Result so far: 12.0
If we take 160 away from 195, we end up with 35.
Bring next digit (4) of the dividend behind the 35 and repeat the process: 354 / 80

Advancing to step 4:
354 divided by 80 is 4 with a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 124.0
If we take 320 away from 354, we end up with 34.
Take the next digit (3) from the dividend and append it to 34, then repeat: 343 / 80

Advancing to step 5:
The number 80 fits into 343 4 times, leaving a remainder of 23.
Record the quotient 4 as the next digit in the result. 
Result so far: 1244.0
If we subtract 320 from 343, we get 23.
Take the next digit (6) from the dividend and append it to 23, then repeat: 236 / 80

On to step 6:
If we divide 236 by 80, we get 2 and a remainder of 76.
The number 2 becomes the next digit in our result. 
Result so far: 12442.0
If we subtract 160 from 236, we get 76.
Include the next digit (3) from the dividend after 76, then repeat: 763 / 80

Moving on to step 7:
80 can be fit into 763 9 times, resulting in a remainder of 43.
Use 9 as the next digit of our solution. 
Result so far: 124429.0
The remainder is 43 after subtracting 720 from 763.
Append the next digit (4) from the dividend to 43 and continue with: 434 / 80

Step 8:
80 can be fit into 434 5 times, resulting in a remainder of 34.
Write down 5 as next digit of the result. 
Result so far: 1244295.0
If we subtract 400 from 434, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 9:
80 can be fit into 340 4 times, resulting in a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 1244295.4
Deduct 320 from 340 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
When dividing 200 by 80, we get 2 with a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 1244295.42
Deduct 160 from 200 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.

Let's proceed to step 11:
400 divided by 80 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1244295.425
Subtracting 400 from 400 leaves us 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.

Let's proceed to step 12:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1244295.425
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 13:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1244295.425
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.

The final outcome is 1244295.425, with a leftover of 0.0.