We divide 81018243 by 91
We want to figure out the number of times 81018243 can be divided by 91.

Moving on to step 1:
The number 91 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 91

Moving on to step 2:
91 goes into 81 0 times with 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.
Take the next digit (0) from the dividend and append it to 81, then repeat: 810 / 91

Moving on to step 3:
When dividing 810 by 91, we get 8 with a remainder of 82.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 728 away from 810, we end up with 82.
Include the next digit (1) from the dividend after 82, then repeat: 821 / 91

Advancing to step 4:
91 can be fit into 821 9 times, resulting in a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 89.0
Subtract 819 from 821 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 91

Advancing to step 5:
91 can be fit into 28 0 times, resulting in a remainder of 28.
The next digit of our result is 0. 
Result so far: 890.0
Subtracting 0 from 28 leaves us with 28.
Include the next digit (2) from the dividend after 28, then repeat: 282 / 91

Moving on to step 6:
91 can be fit into 282 3 times, resulting in a remainder of 9.
The next digit of our result is 3. 
Result so far: 8903.0
Deduct 273 from 282 and we're left with 9.
Include the next digit (4) from the dividend after 9, then repeat: 94 / 91

Moving on to step 7:
94 divided by 91 is 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 89031.0
If we subtract 91 from 94, we get 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 91

Moving on to step 8:
If we divide 33 by 91, we get 0 and a remainder of 33.
Record the quotient 0 as the next digit in the result. 
Result so far: 890310.0
Subtract 0 from 33 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 9:
The number 91 fits into 330 3 times, leaving a remainder of 57.
Put 3 as the next digit of the answer. 
Result so far: 890310.3
If we subtract 273 from 330, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 10:
The number 91 fits into 570 6 times, leaving a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 890310.36
If we subtract 546 from 570, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 11:
240 divided by 91 is 2 with a remainder of 58.
The next digit of our result is 2. 
Result so far: 890310.362
Subtracting 182 from 240 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 12:
If we divide 580 by 91, we get 6 and a remainder of 34.
Write down 6 as next digit of the result. 
Result so far: 890310.3626
If we subtract 546 from 580, 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.

Step 13:
When dividing 340 by 91, we get 3 with a remainder of 67.
Record the quotient 3 as the next digit in the result. 
Result so far: 890310.36263
Deduct 273 from 340 and we're left with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 14:
The number 91 fits into 670 7 times, leaving a remainder of 33.
Write down 7 as next digit of the result. 
Result so far: 890310.362637
If we take 637 away from 670, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 15:
If we divide 330 by 91, we get 3 and a remainder of 57.
Use 3 as the next digit of our solution. 
Result so far: 890310.3626373
Deduct 273 from 330 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 16:
91 goes into 570 6 times with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 890310.36263736
If we subtract 546 from 570, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 890310.36263736 with a remainder of 2.4e-08.