81938253 ÷ 82 
We want to figure out the number of times 81938253 can be divided by 82.

Step 1:
When dividing 8 by 82, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 82

Moving on to step 2:
The number 82 fits into 81 0 times, leaving a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Fetch the next digit (9) from the dividend, attach it to 81 and continue: 819 / 82

Let's proceed to step 3:
When dividing 819 by 82, we get 9 with a remainder of 81.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 81 after subtracting 738 from 819.
Include the next digit (3) from the dividend after 81, then repeat: 813 / 82

Advancing to step 4:
813 divided by 82 is 9 with a remainder of 75.
Use 9 as the next digit of our solution. 
Result so far: 99.0
Subtracting 738 from 813 leaves us with 75.
Include the next digit (8) from the dividend after 75, then repeat: 758 / 82

Let's proceed to step 5:
758 divided by 82 is 9 with a remainder of 20.
Use 9 as the next digit of our solution. 
Result so far: 999.0
If we take 738 away from 758, we end up with 20.
Append the next digit (2) from the dividend to 20 and continue with: 202 / 82

Let's proceed to step 6:
The number 82 fits into 202 2 times, leaving a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 9992.0
Subtract 164 from 202 to get 38.
Take the next digit (5) from the dividend and append it to 38, then repeat: 385 / 82

On to step 7:
If we divide 385 by 82, we get 4 and a remainder of 57.
Write down 4 as next digit of the result. 
Result so far: 99924.0
If we subtract 328 from 385, we get 57.
Grab the next digit (3) from the dividend, add it to 57, then carry on: 573 / 82

Let's proceed to step 8:
573 divided by 82 is 6 with a remainder of 81.
Put 6 as the next digit of the answer. 
Result so far: 999246.0
The remainder is 81 after subtracting 492 from 573.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 9:
The number 82 fits into 810 9 times, leaving a remainder of 72.
The number 9 becomes the next digit in our result. 
Result so far: 999246.9
Subtracting 738 from 810 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 10:
720 divided by 82 is 8 with a remainder of 64.
The number 8 becomes the next digit in our result. 
Result so far: 999246.98
Subtracting 656 from 720 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 11:
The number 82 fits into 640 7 times, leaving a remainder of 66.
The next digit of our result is 7. 
Result so far: 999246.987
Subtracting 574 from 640 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 12:
82 goes into 660 8 times with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 999246.9878
Subtracting 656 from 660 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 13:
82 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 999246.9878
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 14:
82 goes into 400 4 times with a remainder of 72.
Use 4 as the next digit of our solution. 
Result so far: 999246.987804
Deduct 328 from 400 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 15:
82 goes into 720 8 times with a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 999246.9878048
The remainder is 64 after subtracting 656 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 16:
When dividing 640 by 82, we get 7 with a remainder of 66.
The number 7 becomes the next digit in our result. 
Result so far: 999246.98780487
Subtract 574 from 640 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

The final outcome is 999246.98780487, with a leftover of 6.6e-08.