Let's divide 45452485 by 81
The aim is to understand the frequency of 81 in 45452485.

Step 1:
4 divided by 81 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 81

Advancing to step 2:
When dividing 45 by 81, we get 0 with a remainder of 45.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 45 to get 45.
Bring next digit (4) of the dividend behind the 45 and repeat the process: 454 / 81

On to step 3:
The number 81 fits into 454 5 times, leaving a remainder of 49.
The next digit of our result is 5. 
Result so far: 5.0
The remainder is 49 after subtracting 405 from 454.
Fetch the next digit (5) from the dividend, attach it to 49 and continue: 495 / 81

Moving on to step 4:
81 can be fit into 495 6 times, resulting in a remainder of 9.
The next digit of our result is 6. 
Result so far: 56.0
Subtracting 486 from 495 leaves us with 9.
Include the next digit (2) from the dividend after 9, then repeat: 92 / 81

Going ahead to step 5:
92 divided by 81 is 1 with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 561.0
Subtract 81 from 92 to get 11.
Bring next digit (4) of the dividend behind the 11 and repeat the process: 114 / 81

Going ahead to step 6:
When dividing 114 by 81, we get 1 with a remainder of 33.
Record the quotient 1 as the next digit in the result. 
Result so far: 5611.0
The remainder is 33 after subtracting 81 from 114.
Grab the next digit (8) from the dividend, add it to 33, then carry on: 338 / 81

Advancing to step 7:
If we divide 338 by 81, we get 4 and a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 56114.0
If we take 324 away from 338, we end up with 14.
Bring next digit (5) of the dividend behind the 14 and repeat the process: 145 / 81

Step 8:
If we divide 145 by 81, we get 1 and a remainder of 64.
Write down 1 as next digit of the result. 
Result so far: 561141.0
Subtract 81 from 145 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 9:
When dividing 640 by 81, we get 7 with a remainder of 73.
Use 7 as the next digit of our solution. 
Result so far: 561141.7
The remainder is 73 after subtracting 567 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 10:
The number 81 fits into 730 9 times, leaving a remainder of 1.
The next digit of our result is 9. 
Result so far: 561141.79
Subtracting 729 from 730 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 11:
The number 81 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 561141.79
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
When dividing 100 by 81, we get 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 561141.7901
If we subtract 81 from 100, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 13:
190 divided by 81 is 2 with a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 561141.79012
If we take 162 away from 190, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 14:
If we divide 280 by 81, we get 3 and a remainder of 37.
The next digit of our result is 3. 
Result so far: 561141.790123
The remainder is 37 after subtracting 243 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 15:
When dividing 370 by 81, we get 4 with a remainder of 46.
The next digit of our result is 4. 
Result so far: 561141.7901234
The remainder is 46 after subtracting 324 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 16:
81 can be fit into 460 5 times, resulting in a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 561141.79012345
Deduct 405 from 460 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

After the division, we end up with 561141.79012345 and a remainder of 5.5e-08.