781835 divided by 80 
The aim is to understand the frequency of 80 in 781835.

On to step 1:
If we divide 7 by 80, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 80

Step 2:
If we divide 78 by 80, we get 0 and a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Include the next digit (1) from the dividend after 78, then repeat: 781 / 80

Let's proceed to step 3:
When dividing 781 by 80, we get 9 with a remainder of 61.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtract 720 from 781 to get 61.
Append the next digit (8) from the dividend to 61 and continue with: 618 / 80

Moving on to step 4:
80 goes into 618 7 times with a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 97.0
The remainder is 58 after subtracting 560 from 618.
Include the next digit (3) from the dividend after 58, then repeat: 583 / 80

Step 5:
The number 80 fits into 583 7 times, leaving a remainder of 23.
Use 7 as the next digit of our solution. 
Result so far: 977.0
Subtracting 560 from 583 leaves us with 23.
Append the next digit (5) from the dividend to 23 and continue with: 235 / 80

Advancing to step 6:
235 divided by 80 is 2 with a remainder of 75.
Put 2 as the next digit of the answer. 
Result so far: 9772.0
Subtract 160 from 235 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Advancing to step 7:
80 goes into 750 9 times with a remainder of 30.
Use 9 as the next digit of our solution. 
Result so far: 9772.9
Subtracting 720 from 750 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
If we divide 300 by 80, we get 3 and a remainder of 60.
Put 3 as the next digit of the answer. 
Result so far: 9772.93
The remainder is 60 after subtracting 240 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 9:
When dividing 600 by 80, we get 7 with a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 9772.937
The remainder is 40 after subtracting 560 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
400 divided by 80 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 9772.9375
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.

Let's proceed to step 11:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 9772.9375
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 12:
0 divided by 80 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 9772.9375
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.

The final result is 9772.9375 with a remainder of 0.0.