We divide 7517135 by 81
The aim is to understand the frequency of 81 in 7517135.

Step 1:
81 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 81

Step 2:
75 divided by 81 is 0 with a remainder of 75.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 75 leaves us with 75.
Bring next digit (1) of the dividend behind the 75 and repeat the process: 751 / 81

Let's proceed to step 3:
751 divided by 81 is 9 with a remainder of 22.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 729 from 751 to get 22.
Grab the next digit (7) from the dividend, add it to 22, then carry on: 227 / 81

Moving on to step 4:
If we divide 227 by 81, we get 2 and a remainder of 65.
Record the quotient 2 as the next digit in the result. 
Result so far: 92.0
Subtracting 162 from 227 leaves us with 65.
Grab the next digit (1) from the dividend, add it to 65, then carry on: 651 / 81

Advancing to step 5:
The number 81 fits into 651 8 times, leaving a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 928.0
Subtracting 648 from 651 leaves us with 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 81

Step 6:
When dividing 33 by 81, we get 0 with a remainder of 33.
Write down 0 as next digit of the result. 
Result so far: 9280.0
The remainder is 33 after subtracting 0 from 33.
Grab the next digit (5) from the dividend, add it to 33, then carry on: 335 / 81

Advancing to step 7:
If we divide 335 by 81, we get 4 and a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 92804.0
Deduct 324 from 335 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 8:
When dividing 110 by 81, we get 1 with a remainder of 29.
The next digit of our result is 1. 
Result so far: 92804.1
If we take 81 away from 110, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 9:
If we divide 290 by 81, we get 3 and a remainder of 47.
The number 3 becomes the next digit in our result. 
Result so far: 92804.13
Subtracting 243 from 290 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 10:
470 divided by 81 is 5 with a remainder of 65.
The number 5 becomes the next digit in our result. 
Result so far: 92804.135
If we subtract 405 from 470, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 11:
If we divide 650 by 81, we get 8 and a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 92804.1358
Subtract 648 from 650 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 12:
81 goes into 20 0 times with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 92804.1358
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 13:
200 divided by 81 is 2 with a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 92804.135802
Subtracting 162 from 200 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 14:
The number 81 fits into 380 4 times, leaving a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 92804.1358024
Subtract 324 from 380 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 15:
If we divide 560 by 81, we get 6 and a remainder of 74.
Use 6 as the next digit of our solution. 
Result so far: 92804.13580246
If we subtract 486 from 560, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

After the division, we end up with 92804.13580246 and a remainder of 7.4e-08.