Let's divide 353626 by 81
The aim is to understand the frequency of 81 in 353626.

On to step 1:
If we divide 3 by 81, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 81

On to step 2:
35 divided by 81 is 0 with a remainder of 35.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 35 and we're left with 35.
Bring next digit (3) of the dividend behind the 35 and repeat the process: 353 / 81

Step 3:
353 divided by 81 is 4 with a remainder of 29.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 29 after subtracting 324 from 353.
Include the next digit (6) from the dividend after 29, then repeat: 296 / 81

Advancing to step 4:
81 goes into 296 3 times with a remainder of 53.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
Subtracting 243 from 296 leaves us with 53.
Include the next digit (2) from the dividend after 53, then repeat: 532 / 81

Moving on to step 5:
When dividing 532 by 81, we get 6 with a remainder of 46.
Use 6 as the next digit of our solution. 
Result so far: 436.0
If we take 486 away from 532, we end up with 46.
Take the next digit (6) from the dividend and append it to 46, then repeat: 466 / 81

Going ahead to step 6:
81 can be fit into 466 5 times, resulting in a remainder of 61.
The next digit of our result is 5. 
Result so far: 4365.0
Deduct 405 from 466 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 7:
81 goes into 610 7 times with a remainder of 43.
Record the quotient 7 as the next digit in the result. 
Result so far: 4365.7
Deduct 567 from 610 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 8:
81 goes into 430 5 times with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 4365.75
Subtracting 405 from 430 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 9:
The number 81 fits into 250 3 times, leaving a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 4365.753
Subtract 243 from 250 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 10:
The number 81 fits into 70 0 times, leaving a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 4365.753
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 11:
If we divide 700 by 81, we get 8 and a remainder of 52.
Use 8 as the next digit of our solution. 
Result so far: 4365.75308
Subtracting 648 from 700 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 12:
81 can be fit into 520 6 times, resulting in a remainder of 34.
Write down 6 as next digit of the result. 
Result so far: 4365.753086
If we subtract 486 from 520, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 13:
When dividing 340 by 81, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 4365.7530864
The remainder is 16 after subtracting 324 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 14:
If we divide 160 by 81, we get 1 and a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 4365.75308641
Subtract 81 from 160 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

The quotient of the division is 4365.75308641, and the remainder is 7.9e-08.