We divide 302606 by 81
The aim is to understand the frequency of 81 in 302606.

Let's proceed to step 1:
81 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 81

Advancing to step 2:
When dividing 30 by 81, we get 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Fetch the next digit (2) from the dividend, attach it to 30 and continue: 302 / 81

Going ahead to step 3:
302 divided by 81 is 3 with a remainder of 59.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 59 after subtracting 243 from 302.
Grab the next digit (6) from the dividend, add it to 59, then carry on: 596 / 81

Step 4:
The number 81 fits into 596 7 times, leaving a remainder of 29.
Write down 7 as next digit of the result. 
Result so far: 37.0
If we subtract 567 from 596, we get 29.
Grab the next digit (0) from the dividend, add it to 29, then carry on: 290 / 81

Going ahead to step 5:
81 can be fit into 290 3 times, resulting in a remainder of 47.
Write down 3 as next digit of the result. 
Result so far: 373.0
If we take 243 away from 290, we end up with 47.
Fetch the next digit (6) from the dividend, attach it to 47 and continue: 476 / 81

Going ahead to step 6:
If we divide 476 by 81, we get 5 and a remainder of 71.
Record the quotient 5 as the next digit in the result. 
Result so far: 3735.0
Subtract 405 from 476 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 7:
The number 81 fits into 710 8 times, leaving a remainder of 62.
Use 8 as the next digit of our solution. 
Result so far: 3735.8
The remainder is 62 after subtracting 648 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 8:
The number 81 fits into 620 7 times, leaving a remainder of 53.
Use 7 as the next digit of our solution. 
Result so far: 3735.87
The remainder is 53 after subtracting 567 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Going ahead to step 9:
81 goes into 530 6 times with a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 3735.876
If we subtract 486 from 530, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 10:
440 divided by 81 is 5 with a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 3735.8765
Deduct 405 from 440 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 11:
The number 81 fits into 350 4 times, leaving a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 3735.87654
Subtract 324 from 350 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 12:
If we divide 260 by 81, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 3735.876543
Subtracting 243 from 260 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 13:
81 can be fit into 170 2 times, resulting in a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 3735.8765432
Subtracting 162 from 170 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 14:
If we divide 80 by 81, we get 0 and a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 3735.8765432
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

After the division, we end up with 3735.8765432 and a remainder of 8e-08.