We divide 40190800 by 81
The aim is to understand the frequency of 81 in 40190800.

On to step 1:
81 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 81

Let's proceed to step 2:
When dividing 40 by 81, we get 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 40 leaves us with 40.
Fetch the next digit (1) from the dividend, attach it to 40 and continue: 401 / 81

Let's proceed to step 3:
When dividing 401 by 81, we get 4 with a remainder of 77.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 77 after subtracting 324 from 401.
Bring next digit (9) of the dividend behind the 77 and repeat the process: 779 / 81

On to step 4:
If we divide 779 by 81, we get 9 and a remainder of 50.
Use 9 as the next digit of our solution. 
Result so far: 49.0
If we take 729 away from 779, we end up with 50.
Append the next digit (0) from the dividend to 50 and continue with: 500 / 81

Going ahead to step 5:
If we divide 500 by 81, we get 6 and a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 496.0
Deduct 486 from 500 and we're left with 14.
Bring next digit (8) of the dividend behind the 14 and repeat the process: 148 / 81

Step 6:
148 divided by 81 is 1 with a remainder of 67.
The number 1 becomes the next digit in our result. 
Result so far: 4961.0
Subtracting 81 from 148 leaves us with 67.
Fetch the next digit (0) from the dividend, attach it to 67 and continue: 670 / 81

Going ahead to step 7:
81 goes into 670 8 times with a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 49618.0
If we subtract 648 from 670, we get 22.
Grab the next digit (0) from the dividend, add it to 22, then carry on: 220 / 81

On to step 8:
220 divided by 81 is 2 with a remainder of 58.
Use 2 as the next digit of our solution. 
Result so far: 496182.0
If we take 162 away from 220, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 9:
When dividing 580 by 81, we get 7 with a remainder of 13.
The next digit of our result is 7. 
Result so far: 496182.7
If we subtract 567 from 580, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 10:
If we divide 130 by 81, we get 1 and a remainder of 49.
Write down 1 as next digit of the result. 
Result so far: 496182.71
Deduct 81 from 130 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 11:
If we divide 490 by 81, we get 6 and a remainder of 4.
The next digit of our result is 6. 
Result so far: 496182.716
Deduct 486 from 490 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 12:
81 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 496182.716
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 13:
If we divide 400 by 81, we get 4 and a remainder of 76.
The next digit of our result is 4. 
Result so far: 496182.71604
If we take 324 away from 400, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

On to step 14:
When dividing 760 by 81, we get 9 with a remainder of 31.
Record the quotient 9 as the next digit in the result. 
Result so far: 496182.716049
If we take 729 away from 760, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 15:
81 can be fit into 310 3 times, resulting in a remainder of 67.
Record the quotient 3 as the next digit in the result. 
Result so far: 496182.7160493
Subtracting 243 from 310 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Let's proceed to step 16:
The number 81 fits into 670 8 times, leaving a remainder of 22.
Record the quotient 8 as the next digit in the result. 
Result so far: 496182.71604938
Subtracting 648 from 670 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final result is 496182.71604938 with a remainder of 2.2e-08.