290380 divided by 80 
The aim is to understand the frequency of 80 in 290380.

Going ahead to step 1:
2 divided by 80 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 80

Advancing to step 2:
29 divided by 80 is 0 with a remainder of 29.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 29, we end up with 29.
Fetch the next digit (0) from the dividend, attach it to 29 and continue: 290 / 80

Let's proceed to step 3:
80 can be fit into 290 3 times, resulting in a remainder of 50.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 240 from 290 and we're left with 50.
Grab the next digit (3) from the dividend, add it to 50, then carry on: 503 / 80

Let's proceed to step 4:
The number 80 fits into 503 6 times, leaving a remainder of 23.
Write down 6 as next digit of the result. 
Result so far: 36.0
Subtracting 480 from 503 leaves us with 23.
Bring next digit (8) of the dividend behind the 23 and repeat the process: 238 / 80

Let's proceed to step 5:
80 can be fit into 238 2 times, resulting in a remainder of 78.
Write down 2 as next digit of the result. 
Result so far: 362.0
Subtracting 160 from 238 leaves us with 78.
Append the next digit (0) from the dividend to 78 and continue with: 780 / 80

Advancing to step 6:
If we divide 780 by 80, we get 9 and a remainder of 60.
The number 9 becomes the next digit in our result. 
Result so far: 3629.0
The remainder is 60 after subtracting 720 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 7:
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: 3629.7
Subtracting 560 from 600 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
400 divided by 80 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 3629.75
The remainder is 0 after subtracting 400 from 400.
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 9:
If we divide 0 by 80, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 3629.75
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.

On to step 10:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3629.75
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 3629.75 with a remainder of 0.0.