40961664 ÷ 815 
The aim is to understand the frequency of 815 in 40961664.

Going ahead to step 1:
The number 815 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 815

Step 2:
When dividing 40 by 815, we get 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 40 and we're left with 40.
Fetch the next digit (9) from the dividend, attach it to 40 and continue: 409 / 815

Let's proceed to step 3:
If we divide 409 by 815, we get 0 and a remainder of 409.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 409, we get 409.
Take the next digit (6) from the dividend and append it to 409, then repeat: 4096 / 815

Let's proceed to step 4:
When dividing 4096 by 815, we get 5 with a remainder of 21.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtract 4075 from 4096 to get 21.
Bring next digit (1) of the dividend behind the 21 and repeat the process: 211 / 815

Let's proceed to step 5:
If we divide 211 by 815, we get 0 and a remainder of 211.
Write down 0 as next digit of the result. 
Result so far: 50.0
If we subtract 0 from 211, we get 211.
Fetch the next digit (6) from the dividend, attach it to 211 and continue: 2116 / 815

Going ahead to step 6:
The number 815 fits into 2116 2 times, leaving a remainder of 486.
Use 2 as the next digit of our solution. 
Result so far: 502.0
Subtracting 1630 from 2116 leaves us with 486.
Append the next digit (6) from the dividend to 486 and continue with: 4866 / 815

Let's proceed to step 7:
815 can be fit into 4866 5 times, resulting in a remainder of 791.
The number 5 becomes the next digit in our result. 
Result so far: 5025.0
Subtracting 4075 from 4866 leaves us with 791.
Bring next digit (4) of the dividend behind the 791 and repeat the process: 7914 / 815

Going ahead to step 8:
When dividing 7914 by 815, we get 9 with a remainder of 579.
Put 9 as the next digit of the answer. 
Result so far: 50259.0
Deduct 7335 from 7914 and we're left with 579.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5790, and continue the process.

On to step 9:
When dividing 5790 by 815, we get 7 with a remainder of 85.
Record the quotient 7 as the next digit in the result. 
Result so far: 50259.7
Subtract 5705 from 5790 to get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 10:
850 divided by 815 is 1 with a remainder of 35.
Use 1 as the next digit of our solution. 
Result so far: 50259.71
The remainder is 35 after subtracting 815 from 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 11:
The number 815 fits into 350 0 times, leaving a remainder of 350.
Write down 0 as next digit of the result. 
Result so far: 50259.71
The remainder is 350 after subtracting 0 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Advancing to step 12:
3500 divided by 815 is 4 with a remainder of 240.
The number 4 becomes the next digit in our result. 
Result so far: 50259.7104
If we subtract 3260 from 3500, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Step 13:
2400 divided by 815 is 2 with a remainder of 770.
The next digit of our result is 2. 
Result so far: 50259.71042
Subtracting 1630 from 2400 leaves us with 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

Advancing to step 14:
815 goes into 7700 9 times with a remainder of 365.
Use 9 as the next digit of our solution. 
Result so far: 50259.710429
Subtract 7335 from 7700 to get 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Advancing to step 15:
The number 815 fits into 3650 4 times, leaving a remainder of 390.
Write down 4 as next digit of the result. 
Result so far: 50259.7104294
Subtracting 3260 from 3650 leaves us with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Let's proceed to step 16:
815 can be fit into 3900 4 times, resulting in a remainder of 640.
Put 4 as the next digit of the answer. 
Result so far: 50259.71042944
Subtracting 3260 from 3900 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

In conclusion, the division gives 50259.71042944 with a balance of 6.4e-07.