72912257 divided by 280 
The aim is to understand the frequency of 280 in 72912257.

Advancing to step 1:
7 divided by 280 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 280

Advancing to step 2:
If we divide 72 by 280, we get 0 and a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Take the next digit (9) from the dividend and append it to 72, then repeat: 729 / 280

Going ahead to step 3:
If we divide 729 by 280, we get 2 and a remainder of 169.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 560 away from 729, we end up with 169.
Include the next digit (1) from the dividend after 169, then repeat: 1691 / 280

Advancing to step 4:
280 can be fit into 1691 6 times, resulting in a remainder of 11.
The next digit of our result is 6. 
Result so far: 26.0
Subtracting 1680 from 1691 leaves us with 11.
Append the next digit (2) from the dividend to 11 and continue with: 112 / 280

Moving on to step 5:
280 goes into 112 0 times with a remainder of 112.
Use 0 as the next digit of our solution. 
Result so far: 260.0
If we take 0 away from 112, we end up with 112.
Include the next digit (2) from the dividend after 112, then repeat: 1122 / 280

Moving on to step 6:
280 goes into 1122 4 times with a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 2604.0
Deduct 1120 from 1122 and we're left with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 280

Let's proceed to step 7:
When dividing 25 by 280, we get 0 with a remainder of 25.
The next digit of our result is 0. 
Result so far: 26040.0
Subtracting 0 from 25 leaves us with 25.
Bring next digit (7) of the dividend behind the 25 and repeat the process: 257 / 280

Going ahead to step 8:
The number 280 fits into 257 0 times, leaving a remainder of 257.
Use 0 as the next digit of our solution. 
Result so far: 260400.0
The remainder is 257 after subtracting 0 from 257.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

Let's proceed to step 9:
280 can be fit into 2570 9 times, resulting in a remainder of 50.
The next digit of our result is 9. 
Result so far: 260400.9
Subtracting 2520 from 2570 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 10:
When dividing 500 by 280, we get 1 with a remainder of 220.
Put 1 as the next digit of the answer. 
Result so far: 260400.91
If we take 280 away from 500, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 11:
When dividing 2200 by 280, we get 7 with a remainder of 240.
Use 7 as the next digit of our solution. 
Result so far: 260400.917
If we take 1960 away from 2200, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 12:
If we divide 2400 by 280, we get 8 and a remainder of 160.
Record the quotient 8 as the next digit in the result. 
Result so far: 260400.9178
Deduct 2240 from 2400 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 13:
280 goes into 1600 5 times with a remainder of 200.
The next digit of our result is 5. 
Result so far: 260400.91785
Subtract 1400 from 1600 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Going ahead to step 14:
If we divide 2000 by 280, we get 7 and a remainder of 40.
The next digit of our result is 7. 
Result so far: 260400.917857
The remainder is 40 after subtracting 1960 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 15:
280 can be fit into 400 1 times, resulting in a remainder of 120.
Record the quotient 1 as the next digit in the result. 
Result so far: 260400.9178571
If we subtract 280 from 400, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 16:
1200 divided by 280 is 4 with a remainder of 80.
Use 4 as the next digit of our solution. 
Result so far: 260400.91785714
The remainder is 80 after subtracting 1120 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final result is 260400.91785714 with a remainder of 8e-08.