Let's divide 803503 by 80
The aim is to understand the frequency of 80 in 803503.

Advancing to step 1:
If we divide 8 by 80, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 80

Advancing to step 2:
If we divide 80 by 80, we get 1 and a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 80 from 80 leaves us with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 80

Advancing to step 3:
80 goes into 3 0 times with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 10.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 80

Going ahead to step 4:
If we divide 35 by 80, we get 0 and a remainder of 35.
The next digit of our result is 0. 
Result so far: 100.0
The remainder is 35 after subtracting 0 from 35.
Append the next digit (0) from the dividend to 35 and continue with: 350 / 80

Step 5:
350 divided by 80 is 4 with a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 1004.0
The remainder is 30 after subtracting 320 from 350.
Fetch the next digit (3) from the dividend, attach it to 30 and continue: 303 / 80

Step 6:
80 goes into 303 3 times with a remainder of 63.
Use 3 as the next digit of our solution. 
Result so far: 10043.0
Subtracting 240 from 303 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 7:
If we divide 630 by 80, we get 7 and a remainder of 70.
Record the quotient 7 as the next digit in the result. 
Result so far: 10043.7
The remainder is 70 after subtracting 560 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
The number 80 fits into 700 8 times, leaving a remainder of 60.
Put 8 as the next digit of the answer. 
Result so far: 10043.78
If we subtract 640 from 700, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 9:
The number 80 fits into 600 7 times, leaving a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 10043.787
If we subtract 560 from 600, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 10043.7875
Subtract 400 from 400 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 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10043.7875
If we subtract 0 from 0, we 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 12:
When dividing 0 by 80, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10043.7875
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.

Our division results in 10043.7875 with a remaining 0.0.