Let's divide 978543 by 81
The aim is to understand the frequency of 81 in 978543.

Moving on to 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
If we subtract 0 from 9, we get 9.
Fetch the next digit (7) from the dividend, attach it to 9 and continue: 97 / 81

Let's proceed to step 2:
97 divided by 81 is 1 with a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 81 from 97 to get 16.
Take the next digit (8) from the dividend and append it to 16, then repeat: 168 / 81

Going ahead to step 3:
The number 81 fits into 168 2 times, leaving a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 162 from 168 and we're left with 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 81

Advancing to step 4:
65 divided by 81 is 0 with a remainder of 65.
The next digit of our result is 0. 
Result so far: 120.0
Subtract 0 from 65 to get 65.
Append the next digit (4) from the dividend to 65 and continue with: 654 / 81

Step 5:
If we divide 654 by 81, we get 8 and a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 1208.0
Subtract 648 from 654 to get 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 81

Step 6:
The number 81 fits into 63 0 times, leaving a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 12080.0
Subtracting 0 from 63 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 7:
When dividing 630 by 81, we get 7 with a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 12080.7
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.

On to step 8:
81 can be fit into 630 7 times, resulting in a remainder of 63.
Write down 7 as next digit of the result. 
Result so far: 12080.77
Subtracting 567 from 630 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

The final result is 12080.77 with a remainder of 0.063.