72857102 ÷ 64 
The aim is to understand the frequency of 64 in 72857102.

Moving on to step 1:
When dividing 7 by 64, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 64

Advancing to step 2:
When dividing 72 by 64, we get 1 with a remainder of 8.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 64 from 72 and we're left with 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 64

Going ahead to step 3:
The number 64 fits into 88 1 times, leaving a remainder of 24.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 64 from 88, we get 24.
Grab the next digit (5) from the dividend, add it to 24, then carry on: 245 / 64

On to step 4:
64 goes into 245 3 times with a remainder of 53.
Write down 3 as next digit of the result. 
Result so far: 113.0
If we take 192 away from 245, we end up with 53.
Append the next digit (7) from the dividend to 53 and continue with: 537 / 64

On to step 5:
If we divide 537 by 64, we get 8 and a remainder of 25.
The number 8 becomes the next digit in our result. 
Result so far: 1138.0
The remainder is 25 after subtracting 512 from 537.
Bring next digit (1) of the dividend behind the 25 and repeat the process: 251 / 64

Advancing to step 6:
If we divide 251 by 64, we get 3 and a remainder of 59.
Write down 3 as next digit of the result. 
Result so far: 11383.0
If we subtract 192 from 251, we get 59.
Grab the next digit (0) from the dividend, add it to 59, then carry on: 590 / 64

On to step 7:
The number 64 fits into 590 9 times, leaving a remainder of 14.
Put 9 as the next digit of the answer. 
Result so far: 113839.0
The remainder is 14 after subtracting 576 from 590.
Grab the next digit (2) from the dividend, add it to 14, then carry on: 142 / 64

Advancing to step 8:
64 can be fit into 142 2 times, resulting in a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 1138392.0
Subtract 128 from 142 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 9:
64 goes into 140 2 times with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 1138392.2
Deduct 128 from 140 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
If we divide 120 by 64, we get 1 and a remainder of 56.
Put 1 as the next digit of the answer. 
Result so far: 1138392.21
Subtract 64 from 120 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 11:
64 goes into 560 8 times with a remainder of 48.
Write down 8 as next digit of the result. 
Result so far: 1138392.218
The remainder is 48 after subtracting 512 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 12:
64 goes into 480 7 times with a remainder of 32.
The number 7 becomes the next digit in our result. 
Result so far: 1138392.2187
If we take 448 away from 480, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 13:
The number 64 fits into 320 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1138392.21875
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.

Going ahead to step 14:
When dividing 0 by 64, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1138392.21875
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 15:
If we divide 0 by 64, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1138392.21875
If we take 0 away from 0, we end up with 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 result is 1138392.21875 with a remainder of 0.0.