Let's divide 83413375 by 81
The aim is to understand the frequency of 81 in 83413375.

Step 1:
8 divided by 81 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 81

Step 2:
When dividing 83 by 81, we get 1 with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 81 from 83 to get 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 81

Let's proceed to step 3:
When dividing 24 by 81, we get 0 with a remainder of 24.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we subtract 0 from 24, we get 24.
Append the next digit (1) from the dividend to 24 and continue with: 241 / 81

Advancing to step 4:
When dividing 241 by 81, we get 2 with a remainder of 79.
Write down 2 as next digit of the result. 
Result so far: 102.0
Subtract 162 from 241 to get 79.
Fetch the next digit (3) from the dividend, attach it to 79 and continue: 793 / 81

Moving on to step 5:
81 goes into 793 9 times with a remainder of 64.
Use 9 as the next digit of our solution. 
Result so far: 1029.0
Subtracting 729 from 793 leaves us with 64.
Take the next digit (3) from the dividend and append it to 64, then repeat: 643 / 81

Going ahead to step 6:
When dividing 643 by 81, we get 7 with a remainder of 76.
The number 7 becomes the next digit in our result. 
Result so far: 10297.0
Subtracting 567 from 643 leaves us with 76.
Fetch the next digit (7) from the dividend, attach it to 76 and continue: 767 / 81

Let's proceed to step 7:
767 divided by 81 is 9 with a remainder of 38.
Put 9 as the next digit of the answer. 
Result so far: 102979.0
Subtract 729 from 767 to get 38.
Fetch the next digit (5) from the dividend, attach it to 38 and continue: 385 / 81

Step 8:
If we divide 385 by 81, we get 4 and a remainder of 61.
Use 4 as the next digit of our solution. 
Result so far: 1029794.0
Subtracting 324 from 385 leaves us 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.

Going ahead to step 9:
If we divide 610 by 81, we get 7 and a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 1029794.7
If we take 567 away from 610, we end up 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.

Step 10:
The number 81 fits into 430 5 times, leaving a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 1029794.75
If we subtract 405 from 430, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 11:
250 divided by 81 is 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 1029794.753
The remainder is 7 after subtracting 243 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 12:
81 goes into 70 0 times with a remainder of 70.
The next digit of our result is 0. 
Result so far: 1029794.753
If we subtract 0 from 70, we 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.

Step 13:
The number 81 fits into 700 8 times, leaving a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 1029794.75308
If we subtract 648 from 700, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 14:
When dividing 520 by 81, we get 6 with a remainder of 34.
Put 6 as the next digit of the answer. 
Result so far: 1029794.753086
If we take 486 away from 520, we end up with 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 15:
81 can be fit into 340 4 times, resulting in a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 1029794.7530864
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.

Moving on to step 16:
When dividing 160 by 81, we get 1 with a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 1029794.75308641
If we take 81 away from 160, we end up with 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 final outcome is 1029794.75308641, with a leftover of 7.9e-08.