Let's divide 970908 by 81
The aim is to understand the frequency of 81 in 970908.

Step 1:
If we divide 9 by 81, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (7) from the dividend after 9, then repeat: 97 / 81

Advancing to step 2:
81 can be fit into 97 1 times, resulting in a remainder of 16.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 81 from 97 and we're left with 16.
Grab the next digit (0) from the dividend, add it to 16, then carry on: 160 / 81

Step 3:
The number 81 fits into 160 1 times, leaving a remainder of 79.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Subtract 81 from 160 to get 79.
Fetch the next digit (9) from the dividend, attach it to 79 and continue: 799 / 81

On to step 4:
81 goes into 799 9 times with a remainder of 70.
The number 9 becomes the next digit in our result. 
Result so far: 119.0
If we take 729 away from 799, we end up with 70.
Bring next digit (0) of the dividend behind the 70 and repeat the process: 700 / 81

Let's proceed to step 5:
The number 81 fits into 700 8 times, leaving a remainder of 52.
The next digit of our result is 8. 
Result so far: 1198.0
Deduct 648 from 700 and we're left with 52.
Grab the next digit (8) from the dividend, add it to 52, then carry on: 528 / 81

Advancing to step 6:
81 can be fit into 528 6 times, resulting in a remainder of 42.
Record the quotient 6 as the next digit in the result. 
Result so far: 11986.0
If we take 486 away from 528, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 7:
81 can be fit into 420 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 11986.5
Deduct 405 from 420 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 8:
When dividing 150 by 81, we get 1 with a remainder of 69.
The next digit of our result is 1. 
Result so far: 11986.51
The remainder is 69 after subtracting 81 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Let's proceed to step 9:
81 goes into 690 8 times with a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 11986.518
The remainder is 42 after subtracting 648 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 10:
81 goes into 420 5 times with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 11986.5185
Deduct 405 from 420 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 11:
81 goes into 150 1 times with a remainder of 69.
Record the quotient 1 as the next digit in the result. 
Result so far: 11986.51851
Deduct 81 from 150 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Going ahead to step 12:
690 divided by 81 is 8 with a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 11986.518518
If we subtract 648 from 690, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 13:
The number 81 fits into 420 5 times, leaving a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 11986.5185185
The remainder is 15 after subtracting 405 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 14:
81 goes into 150 1 times with a remainder of 69.
The number 1 becomes the next digit in our result. 
Result so far: 11986.51851851
Deduct 81 from 150 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

In conclusion, the division gives 11986.51851851 with a balance of 6.9e-08.