We divide 947439 by 81
The aim is to understand the frequency of 81 in 947439.

Let's proceed to step 1:
When dividing 9 by 81, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (4) of the dividend behind the 9 and repeat the process: 94 / 81

Going ahead to step 2:
The number 81 fits into 94 1 times, leaving a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 81 from 94 to get 13.
Grab the next digit (7) from the dividend, add it to 13, then carry on: 137 / 81

On to step 3:
If we divide 137 by 81, we get 1 and a remainder of 56.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtract 81 from 137 to get 56.
Fetch the next digit (4) from the dividend, attach it to 56 and continue: 564 / 81

Going ahead to step 4:
When dividing 564 by 81, we get 6 with a remainder of 78.
Put 6 as the next digit of the answer. 
Result so far: 116.0
Subtract 486 from 564 to get 78.
Fetch the next digit (3) from the dividend, attach it to 78 and continue: 783 / 81

Going ahead to step 5:
If we divide 783 by 81, we get 9 and a remainder of 54.
Use 9 as the next digit of our solution. 
Result so far: 1169.0
If we take 729 away from 783, we end up with 54.
Fetch the next digit (9) from the dividend, attach it to 54 and continue: 549 / 81

Moving on to step 6:
If we divide 549 by 81, we get 6 and a remainder of 63.
The next digit of our result is 6. 
Result so far: 11696.0
The remainder is 63 after subtracting 486 from 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

On to step 7:
If we divide 630 by 81, we get 7 and a remainder of 63.
Record the quotient 7 as the next digit in the result. 
Result so far: 11696.7
If we subtract 567 from 630, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Going ahead to step 8:
81 can be fit into 630 7 times, resulting in a remainder of 63.
The next digit of our result is 7. 
Result so far: 11696.77
Subtract 567 from 630 to get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

In conclusion, the division gives 11696.77 with a balance of 0.063.