We divide 91480894 by 81
The aim is to understand the frequency of 81 in 91480894.

Step 1:
When dividing 9 by 81, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 81

Let's proceed to step 2:
81 goes into 91 1 times with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 81 from 91 leaves us with 10.
Include the next digit (4) from the dividend after 10, then repeat: 104 / 81

Let's proceed to step 3:
104 divided by 81 is 1 with a remainder of 23.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtracting 81 from 104 leaves us with 23.
Grab the next digit (8) from the dividend, add it to 23, then carry on: 238 / 81

Moving on to step 4:
81 goes into 238 2 times with a remainder of 76.
The number 2 becomes the next digit in our result. 
Result so far: 112.0
Subtracting 162 from 238 leaves us with 76.
Include the next digit (0) from the dividend after 76, then repeat: 760 / 81

Moving on to step 5:
81 goes into 760 9 times with a remainder of 31.
Record the quotient 9 as the next digit in the result. 
Result so far: 1129.0
If we subtract 729 from 760, we get 31.
Include the next digit (8) from the dividend after 31, then repeat: 318 / 81

Let's proceed to step 6:
When dividing 318 by 81, we get 3 with a remainder of 75.
Record the quotient 3 as the next digit in the result. 
Result so far: 11293.0
Deduct 243 from 318 and we're left with 75.
Take the next digit (9) from the dividend and append it to 75, then repeat: 759 / 81

On to step 7:
81 goes into 759 9 times with a remainder of 30.
Put 9 as the next digit of the answer. 
Result so far: 112939.0
If we subtract 729 from 759, we get 30.
Fetch the next digit (4) from the dividend, attach it to 30 and continue: 304 / 81

On to step 8:
81 goes into 304 3 times with a remainder of 61.
Use 3 as the next digit of our solution. 
Result so far: 1129393.0
The remainder is 61 after subtracting 243 from 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

On to step 9:
When dividing 610 by 81, we get 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 1129393.7
Subtracting 567 from 610 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 10:
430 divided by 81 is 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 1129393.75
Subtract 405 from 430 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 11:
If we divide 250 by 81, we get 3 and a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 1129393.753
If we take 243 away from 250, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 12:
70 divided by 81 is 0 with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 1129393.753
The remainder is 70 after subtracting 0 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 13:
The number 81 fits into 700 8 times, leaving a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 1129393.75308
Deduct 648 from 700 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 14:
81 goes into 520 6 times with a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 1129393.753086
If we subtract 486 from 520, 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.

Going ahead to step 15:
When dividing 340 by 81, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 1129393.7530864
The remainder is 16 after subtracting 324 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 16:
When dividing 160 by 81, we get 1 with a remainder of 79.
Use 1 as the next digit of our solution. 
Result so far: 1129393.75308641
If we take 81 away from 160, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Our division results in 1129393.75308641 with a remaining 7.9e-08.