We divide 813085 by 80
The aim is to understand the frequency of 80 in 813085.

On to step 1:
If we divide 8 by 80, we get 0 and 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.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 80

Moving on to step 2:
81 divided by 80 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 80 from 81, we get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 80

Advancing to step 3:
When dividing 13 by 80, we get 0 with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 13, we get 13.
Fetch the next digit (0) from the dividend, attach it to 13 and continue: 130 / 80

Advancing to step 4:
If we divide 130 by 80, we get 1 and a remainder of 50.
Write down 1 as next digit of the result. 
Result so far: 101.0
Deduct 80 from 130 and we're left with 50.
Bring next digit (8) of the dividend behind the 50 and repeat the process: 508 / 80

Advancing to step 5:
508 divided by 80 is 6 with a remainder of 28.
Write down 6 as next digit of the result. 
Result so far: 1016.0
Subtract 480 from 508 to get 28.
Take the next digit (5) from the dividend and append it to 28, then repeat: 285 / 80

Going ahead to step 6:
285 divided by 80 is 3 with a remainder of 45.
Record the quotient 3 as the next digit in the result. 
Result so far: 10163.0
If we subtract 240 from 285, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 7:
The number 80 fits into 450 5 times, leaving a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 10163.5
Subtract 400 from 450 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 8:
80 goes into 500 6 times with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 10163.56
The remainder is 20 after subtracting 480 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
If we divide 200 by 80, we get 2 and a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 10163.562
If we subtract 160 from 200, 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.

Step 10:
80 goes into 400 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 10163.5625
Subtracting 400 from 400 leaves us 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 11:
80 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10163.5625
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.

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: 10163.5625
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.

Our division results in 10163.5625 with a remaining 0.0.