Let's divide 81217011 by 91
We want to divide 81217011 by 91.

Going ahead to step 1:
When dividing 8 by 91, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 91

Step 2:
The number 91 fits into 81 0 times, leaving a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Append the next digit (2) from the dividend to 81 and continue with: 812 / 91

On to step 3:
When dividing 812 by 91, we get 8 with a remainder of 84.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 728 from 812, we get 84.
Grab the next digit (1) from the dividend, add it to 84, then carry on: 841 / 91

Let's proceed to step 4:
841 divided by 91 is 9 with a remainder of 22.
Use 9 as the next digit of our solution. 
Result so far: 89.0
If we subtract 819 from 841, we get 22.
Append the next digit (7) from the dividend to 22 and continue with: 227 / 91

Moving on to step 5:
When dividing 227 by 91, we get 2 with a remainder of 45.
Put 2 as the next digit of the answer. 
Result so far: 892.0
If we subtract 182 from 227, we get 45.
Include the next digit (0) from the dividend after 45, then repeat: 450 / 91

Moving on to step 6:
The number 91 fits into 450 4 times, leaving a remainder of 86.
The number 4 becomes the next digit in our result. 
Result so far: 8924.0
The remainder is 86 after subtracting 364 from 450.
Bring next digit (1) of the dividend behind the 86 and repeat the process: 861 / 91

Let's proceed to step 7:
91 can be fit into 861 9 times, resulting in a remainder of 42.
Write down 9 as next digit of the result. 
Result so far: 89249.0
Subtracting 819 from 861 leaves us with 42.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 91

Let's proceed to step 8:
91 goes into 421 4 times with a remainder of 57.
Put 4 as the next digit of the answer. 
Result so far: 892494.0
Subtract 364 from 421 to 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.

Going ahead to step 9:
When dividing 570 by 91, we get 6 with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 892494.6
Subtract 546 from 570 to 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.

Step 10:
When dividing 240 by 91, we get 2 with a remainder of 58.
The next digit of our result is 2. 
Result so far: 892494.62
If we take 182 away from 240, we end up 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.

Going ahead to step 11:
When dividing 580 by 91, we get 6 with a remainder of 34.
Put 6 as the next digit of the answer. 
Result so far: 892494.626
Subtracting 546 from 580 leaves us with 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 12:
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: 892494.6263
The remainder is 67 after subtracting 273 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Moving on to step 13:
91 goes into 670 7 times with a remainder of 33.
Use 7 as the next digit of our solution. 
Result so far: 892494.62637
The remainder is 33 after subtracting 637 from 670.
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 14:
If we divide 330 by 91, we get 3 and a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 892494.626373
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.

Let's proceed to step 15:
If we divide 570 by 91, we get 6 and a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 892494.6263736
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.

On to step 16:
240 divided by 91 is 2 with a remainder of 58.
Use 2 as the next digit of our solution. 
Result so far: 892494.62637362
Subtract 182 from 240 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

In conclusion, the division gives 892494.62637362 with a balance of 5.8e-08.