Let's divide 386999 by 81
The aim is to understand the frequency of 81 in 386999.

Advancing to step 1:
3 divided by 81 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 81

Moving on to step 2:
81 can be fit into 38 0 times, resulting in a remainder of 38.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 38, we get 38.
Take the next digit (6) from the dividend and append it to 38, then repeat: 386 / 81

Advancing to step 3:
When dividing 386 by 81, we get 4 with a remainder of 62.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 324 from 386 to get 62.
Append the next digit (9) from the dividend to 62 and continue with: 629 / 81

Step 4:
When dividing 629 by 81, we get 7 with a remainder of 62.
The next digit of our result is 7. 
Result so far: 47.0
Deduct 567 from 629 and we're left with 62.
Bring next digit (9) of the dividend behind the 62 and repeat the process: 629 / 81

Step 5:
81 can be fit into 629 7 times, resulting in a remainder of 62.
Use 7 as the next digit of our solution. 
Result so far: 477.0
If we take 567 away from 629, we end up with 62.
Grab the next digit (9) from the dividend, add it to 62, then carry on: 629 / 81

Advancing to step 6:
81 can be fit into 629 7 times, resulting in a remainder of 62.
The next digit of our result is 7. 
Result so far: 4777.0
Subtract 567 from 629 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 7:
81 can be fit into 620 7 times, resulting in a remainder of 53.
Put 7 as the next digit of the answer. 
Result so far: 4777.7
If we take 567 away from 620, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Advancing to step 8:
81 goes into 530 6 times with a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 4777.76
The remainder is 44 after subtracting 486 from 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 9:
81 goes into 440 5 times with a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 4777.765
If we take 405 away from 440, we end up 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.

Advancing to step 10:
If we divide 350 by 81, we get 4 and a remainder of 26.
The next digit of our result is 4. 
Result so far: 4777.7654
The remainder is 26 after subtracting 324 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 11:
81 goes into 260 3 times with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 4777.76543
If we subtract 243 from 260, we get 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 12:
When dividing 170 by 81, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 4777.765432
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.

Advancing to step 13:
If we divide 80 by 81, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 4777.765432
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 14:
81 goes into 800 9 times with a remainder of 71.
The next digit of our result is 9. 
Result so far: 4777.76543209
Deduct 729 from 800 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

In conclusion, the division gives 4777.76543209 with a balance of 7.1e-08.