We divide 816639 by 64
The aim is to understand the frequency of 64 in 816639.

Let's proceed to step 1:
The number 64 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 64

Advancing to step 2:
When dividing 81 by 64, we get 1 with a remainder of 17.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 64 from 81, we get 17.
Grab the next digit (6) from the dividend, add it to 17, then carry on: 176 / 64

Let's proceed to step 3:
If we divide 176 by 64, we get 2 and a remainder of 48.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 48 after subtracting 128 from 176.
Grab the next digit (6) from the dividend, add it to 48, then carry on: 486 / 64

Step 4:
The number 64 fits into 486 7 times, leaving a remainder of 38.
Put 7 as the next digit of the answer. 
Result so far: 127.0
Subtract 448 from 486 to get 38.
Include the next digit (3) from the dividend after 38, then repeat: 383 / 64

On to step 5:
The number 64 fits into 383 5 times, leaving a remainder of 63.
Put 5 as the next digit of the answer. 
Result so far: 1275.0
Subtract 320 from 383 to get 63.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 64

Moving on to step 6:
639 divided by 64 is 9 with a remainder of 63.
Record the quotient 9 as the next digit in the result. 
Result so far: 12759.0
If we subtract 576 from 639, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Let's proceed to step 7:
If we divide 630 by 64, we get 9 and a remainder of 54.
Use 9 as the next digit of our solution. 
Result so far: 12759.9
Deduct 576 from 630 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 8:
540 divided by 64 is 8 with a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 12759.98
If we subtract 512 from 540, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 9:
If we divide 280 by 64, we get 4 and a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 12759.984
If we subtract 256 from 280, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 10:
If we divide 240 by 64, we get 3 and a remainder of 48.
The number 3 becomes the next digit in our result. 
Result so far: 12759.9843
Subtracting 192 from 240 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 11:
64 goes into 480 7 times with a remainder of 32.
The next digit of our result is 7. 
Result so far: 12759.98437
Subtract 448 from 480 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 12:
When dividing 320 by 64, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 12759.984375
Subtract 320 from 320 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 13:
When dividing 0 by 64, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12759.984375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 14:
The number 64 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 12759.984375
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 12759.984375, with a leftover of 0.0.