763213 ÷ 81 
The aim is to understand the frequency of 81 in 763213.

Going ahead to step 1:
The number 81 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 81

Moving on to step 2:
81 can be fit into 76 0 times, resulting in a remainder of 76.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 76 to get 76.
Take the next digit (3) from the dividend and append it to 76, then repeat: 763 / 81

On to step 3:
The number 81 fits into 763 9 times, leaving a remainder of 34.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we take 729 away from 763, we end up with 34.
Include the next digit (2) from the dividend after 34, then repeat: 342 / 81

Going ahead to step 4:
When dividing 342 by 81, we get 4 with a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 94.0
If we take 324 away from 342, we end up with 18.
Take the next digit (1) from the dividend and append it to 18, then repeat: 181 / 81

Going ahead to step 5:
When dividing 181 by 81, we get 2 with a remainder of 19.
Use 2 as the next digit of our solution. 
Result so far: 942.0
If we subtract 162 from 181, we get 19.
Fetch the next digit (3) from the dividend, attach it to 19 and continue: 193 / 81

Going ahead to step 6:
If we divide 193 by 81, we get 2 and a remainder of 31.
Write down 2 as next digit of the result. 
Result so far: 9422.0
If we subtract 162 from 193, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 7:
81 can be fit into 310 3 times, resulting in a remainder of 67.
Use 3 as the next digit of our solution. 
Result so far: 9422.3
Subtract 243 from 310 to get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 8:
When dividing 670 by 81, we get 8 with a remainder of 22.
The number 8 becomes the next digit in our result. 
Result so far: 9422.38
Deduct 648 from 670 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 9:
If we divide 220 by 81, we get 2 and a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 9422.382
The remainder is 58 after subtracting 162 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 10:
81 goes into 580 7 times with a remainder of 13.
The next digit of our result is 7. 
Result so far: 9422.3827
If we subtract 567 from 580, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 11:
When dividing 130 by 81, we get 1 with a remainder of 49.
Write down 1 as next digit of the result. 
Result so far: 9422.38271
The remainder is 49 after subtracting 81 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 12:
490 divided by 81 is 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 9422.382716
If we take 486 away from 490, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 13:
40 divided by 81 is 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 9422.382716
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 14:
When dividing 400 by 81, we get 4 with a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 9422.38271604
If we take 324 away from 400, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The quotient of the division is 9422.38271604, and the remainder is 7.6e-08.