We're dividing 841613 by 81 
The aim is to understand the frequency of 81 in 841613.

On to step 1:
The number 81 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 81

Advancing to step 2:
81 can be fit into 84 1 times, resulting in a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 81 from 84 leaves us with 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 81

Advancing to step 3:
31 divided by 81 is 0 with a remainder of 31.
The next digit of our result is 0. 
Result so far: 10.0
Subtracting 0 from 31 leaves us with 31.
Take the next digit (6) from the dividend and append it to 31, then repeat: 316 / 81

On to step 4:
81 goes into 316 3 times with a remainder of 73.
The number 3 becomes the next digit in our result. 
Result so far: 103.0
If we take 243 away from 316, we end up with 73.
Fetch the next digit (1) from the dividend, attach it to 73 and continue: 731 / 81

Moving on to step 5:
The number 81 fits into 731 9 times, leaving a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 1039.0
If we take 729 away from 731, we end up with 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 81

Advancing to step 6:
81 can be fit into 23 0 times, resulting in a remainder of 23.
The number 0 becomes the next digit in our result. 
Result so far: 10390.0
The remainder is 23 after subtracting 0 from 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 7:
When dividing 230 by 81, we get 2 with a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 10390.2
If we subtract 162 from 230, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 8:
81 can be fit into 680 8 times, resulting in a remainder of 32.
The next digit of our result is 8. 
Result so far: 10390.28
If we take 648 away from 680, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 9:
81 goes into 320 3 times with a remainder of 77.
Record the quotient 3 as the next digit in the result. 
Result so far: 10390.283
If we subtract 243 from 320, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Going ahead to step 10:
81 can be fit into 770 9 times, resulting in a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 10390.2839
Deduct 729 from 770 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 11:
If we divide 410 by 81, we get 5 and a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 10390.28395
Deduct 405 from 410 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 12:
81 goes into 50 0 times with a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 10390.28395
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 13:
The number 81 fits into 500 6 times, leaving a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 10390.2839506
Subtract 486 from 500 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 14:
140 divided by 81 is 1 with a remainder of 59.
Record the quotient 1 as the next digit in the result. 
Result so far: 10390.28395061
If we take 81 away from 140, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

The quotient of the division is 10390.28395061, and the remainder is 5.9e-08.