803090 divided by 64 
The aim is to understand the frequency of 64 in 803090.

Step 1:
If we divide 8 by 64, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 64

Going ahead to step 2:
If we divide 80 by 64, we get 1 and a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 64 from 80 to get 16.
Fetch the next digit (3) from the dividend, attach it to 16 and continue: 163 / 64

Step 3:
64 goes into 163 2 times with a remainder of 35.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 128 from 163 and we're left with 35.
Fetch the next digit (0) from the dividend, attach it to 35 and continue: 350 / 64

Step 4:
The number 64 fits into 350 5 times, leaving a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 125.0
Deduct 320 from 350 and we're left with 30.
Append the next digit (9) from the dividend to 30 and continue with: 309 / 64

Moving on to step 5:
64 can be fit into 309 4 times, resulting in a remainder of 53.
The next digit of our result is 4. 
Result so far: 1254.0
The remainder is 53 after subtracting 256 from 309.
Grab the next digit (0) from the dividend, add it to 53, then carry on: 530 / 64

Let's proceed to step 6:
530 divided by 64 is 8 with a remainder of 18.
Use 8 as the next digit of our solution. 
Result so far: 12548.0
Deduct 512 from 530 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
180 divided by 64 is 2 with a remainder of 52.
Record the quotient 2 as the next digit in the result. 
Result so far: 12548.2
Subtracting 128 from 180 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 8:
When dividing 520 by 64, we get 8 with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 12548.28
The remainder is 8 after subtracting 512 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
The number 64 fits into 80 1 times, leaving a remainder of 16.
The next digit of our result is 1. 
Result so far: 12548.281
Subtract 64 from 80 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
64 goes into 160 2 times with a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 12548.2812
Subtracting 128 from 160 leaves us 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.

Step 11:
The number 64 fits into 320 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 12548.28125
Deduct 320 from 320 and we're left 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.

Moving on to step 12:
The number 64 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12548.28125
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.

Moving on to step 13:
The number 64 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 12548.28125
Deduct 0 from 0 and we're left 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 outcome is 12548.28125, with a leftover of 0.0.