We divide 81992839 by 2
We want to figure out the number of times 81992839 can be divided by 2.

Going ahead to step 1:
The number 2 fits into 8 4 times, leaving a remainder of 0.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 8 from 8, we get 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 2

On to step 2:
2 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 2

Step 3:
The number 2 fits into 19 9 times, leaving a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 409.0
Subtract 18 from 19 to get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 2

Advancing to step 4:
The number 2 fits into 19 9 times, leaving a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 4099.0
Deduct 18 from 19 and we're left with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 2

Moving on to step 5:
12 divided by 2 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 40996.0
Deduct 12 from 12 and we're left with 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 2

Going ahead to step 6:
If we divide 8 by 2, we get 4 and a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 409964.0
Subtracting 8 from 8 leaves us with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 2

On to step 7:
2 goes into 3 1 times with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 4099641.0
The remainder is 1 after subtracting 2 from 3.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 2

Moving on to step 8:
The number 2 fits into 19 9 times, leaving a remainder of 1.
The next digit of our result is 9. 
Result so far: 40996419.0
If we take 18 away from 19, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
The number 2 fits into 10 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 40996419.5
Subtract 10 from 10 to 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.

On to step 10:
When dividing 0 by 2, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 40996419.5
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.

Going ahead to step 11:
2 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 40996419.5
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.

The final outcome is 40996419.5, with a leftover of 0.0.