662712 divided by 81 
The aim is to understand the frequency of 81 in 662712.

Step 1:
When dividing 6 by 81, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 81

Let's proceed to step 2:
The number 81 fits into 66 0 times, leaving a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Append the next digit (2) from the dividend to 66 and continue with: 662 / 81

Moving on to step 3:
If we divide 662 by 81, we get 8 and a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 648 from 662 leaves us with 14.
Fetch the next digit (7) from the dividend, attach it to 14 and continue: 147 / 81

On to step 4:
147 divided by 81 is 1 with a remainder of 66.
Write down 1 as next digit of the result. 
Result so far: 81.0
Subtracting 81 from 147 leaves us with 66.
Include the next digit (1) from the dividend after 66, then repeat: 661 / 81

Going ahead to step 5:
661 divided by 81 is 8 with a remainder of 13.
Put 8 as the next digit of the answer. 
Result so far: 818.0
Subtract 648 from 661 to get 13.
Include the next digit (2) from the dividend after 13, then repeat: 132 / 81

Moving on to step 6:
81 goes into 132 1 times with a remainder of 51.
The next digit of our result is 1. 
Result so far: 8181.0
If we subtract 81 from 132, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 7:
When dividing 510 by 81, we get 6 with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 8181.6
If we subtract 486 from 510, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 8:
81 goes into 240 2 times with a remainder of 78.
The number 2 becomes the next digit in our result. 
Result so far: 8181.62
Subtracting 162 from 240 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 9:
When dividing 780 by 81, we get 9 with a remainder of 51.
Use 9 as the next digit of our solution. 
Result so far: 8181.629
The remainder is 51 after subtracting 729 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 10:
When dividing 510 by 81, we get 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 8181.6296
If we take 486 away from 510, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 11:
240 divided by 81 is 2 with a remainder of 78.
Put 2 as the next digit of the answer. 
Result so far: 8181.62962
If we take 162 away from 240, we end up with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 12:
81 can be fit into 780 9 times, resulting in a remainder of 51.
The number 9 becomes the next digit in our result. 
Result so far: 8181.629629
If we take 729 away from 780, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

On to step 13:
The number 81 fits into 510 6 times, leaving a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 8181.6296296
If we take 486 away from 510, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 14:
When dividing 240 by 81, we get 2 with a remainder of 78.
The number 2 becomes the next digit in our result. 
Result so far: 8181.62962962
If we subtract 162 from 240, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

The final result is 8181.62962962 with a remainder of 7.8e-08.