658479 divided by 81 
The aim is to understand the frequency of 81 in 658479.

Let's proceed to step 1:
The number 81 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 81

Going ahead to step 2:
65 divided by 81 is 0 with a remainder of 65.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 65 after subtracting 0 from 65.
Bring next digit (8) of the dividend behind the 65 and repeat the process: 658 / 81

Step 3:
If we divide 658 by 81, we get 8 and a remainder of 10.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 648 from 658 to get 10.
Take the next digit (4) from the dividend and append it to 10, then repeat: 104 / 81

Advancing to step 4:
When dividing 104 by 81, we get 1 with a remainder of 23.
Write down 1 as next digit of the result. 
Result so far: 81.0
Deduct 81 from 104 and we're left with 23.
Fetch the next digit (7) from the dividend, attach it to 23 and continue: 237 / 81

Moving on to step 5:
When dividing 237 by 81, we get 2 with a remainder of 75.
Use 2 as the next digit of our solution. 
Result so far: 812.0
The remainder is 75 after subtracting 162 from 237.
Grab the next digit (9) from the dividend, add it to 75, then carry on: 759 / 81

Let's proceed to step 6:
If we divide 759 by 81, we get 9 and a remainder of 30.
Record the quotient 9 as the next digit in the result. 
Result so far: 8129.0
The remainder is 30 after subtracting 729 from 759.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 7:
The number 81 fits into 300 3 times, leaving a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 8129.3
Deduct 243 from 300 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

On to step 8:
81 goes into 570 7 times with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 8129.37
Deduct 567 from 570 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 9:
30 divided by 81 is 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 8129.37
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 10:
300 divided by 81 is 3 with a remainder of 57.
Use 3 as the next digit of our solution. 
Result so far: 8129.3703
Subtract 243 from 300 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.

Step 11:
81 goes into 570 7 times with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 8129.37037
Subtracting 567 from 570 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 12:
81 can be fit into 30 0 times, resulting in a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 8129.37037
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 13:
81 goes into 300 3 times with a remainder of 57.
The next digit of our result is 3. 
Result so far: 8129.3703703
The remainder is 57 after subtracting 243 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 14:
570 divided by 81 is 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 8129.37037037
If we take 567 away from 570, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The quotient of the division is 8129.37037037, and the remainder is 3e-09.