We divide 15742369 by 80
The aim is to understand the frequency of 80 in 15742369.

Advancing to step 1:
When dividing 1 by 80, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 80

Step 2:
15 divided by 80 is 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Include the next digit (7) from the dividend after 15, then repeat: 157 / 80

On to step 3:
When dividing 157 by 80, we get 1 with a remainder of 77.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 80 from 157 and we're left with 77.
Take the next digit (4) from the dividend and append it to 77, then repeat: 774 / 80

Let's proceed to step 4:
The number 80 fits into 774 9 times, leaving a remainder of 54.
The next digit of our result is 9. 
Result so far: 19.0
Subtracting 720 from 774 leaves us with 54.
Include the next digit (2) from the dividend after 54, then repeat: 542 / 80

Moving on to step 5:
The number 80 fits into 542 6 times, leaving a remainder of 62.
Use 6 as the next digit of our solution. 
Result so far: 196.0
If we subtract 480 from 542, we get 62.
Fetch the next digit (3) from the dividend, attach it to 62 and continue: 623 / 80

Moving on to step 6:
When dividing 623 by 80, we get 7 with a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 1967.0
If we take 560 away from 623, we end up with 63.
Bring next digit (6) of the dividend behind the 63 and repeat the process: 636 / 80

On to step 7:
If we divide 636 by 80, we get 7 and a remainder of 76.
The next digit of our result is 7. 
Result so far: 19677.0
If we take 560 away from 636, we end up with 76.
Include the next digit (9) from the dividend after 76, then repeat: 769 / 80

Let's proceed to step 8:
The number 80 fits into 769 9 times, leaving a remainder of 49.
Put 9 as the next digit of the answer. 
Result so far: 196779.0
If we take 720 away from 769, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 9:
80 goes into 490 6 times with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 196779.6
If we take 480 away from 490, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 10:
100 divided by 80 is 1 with a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 196779.61
If we subtract 80 from 100, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 11:
200 divided by 80 is 2 with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 196779.612
The remainder is 40 after subtracting 160 from 200.
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 12:
400 divided by 80 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 196779.6125
If we take 400 away from 400, 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 13:
0 divided by 80 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 196779.6125
Subtracting 0 from 0 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.

Let's proceed to step 14:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 196779.6125
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.

Our division results in 196779.6125 with a remaining 0.0.