870804 divided by 28 
The aim is to understand the frequency of 28 in 870804.

Going ahead to step 1:
28 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 28

On to step 2:
87 divided by 28 is 3 with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 84 from 87, we get 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 28

Going ahead to step 3:
28 goes into 30 1 times with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 31.0
Subtracting 28 from 30 leaves us with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 28

Step 4:
28 divided by 28 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 311.0
Deduct 28 from 28 and we're left with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 28

On to step 5:
28 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 3110.0
If we subtract 0 from 0, we get 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 28

Let's proceed to step 6:
If we divide 4 by 28, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 31100.0
Subtracting 0 from 4 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
The number 28 fits into 40 1 times, leaving a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 31100.1
The remainder is 12 after subtracting 28 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
The number 28 fits into 120 4 times, leaving a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 31100.14
If we subtract 112 from 120, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 9:
80 divided by 28 is 2 with a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 31100.142
Subtract 56 from 80 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 10:
The number 28 fits into 240 8 times, leaving a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 31100.1428
Subtract 224 from 240 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 11:
160 divided by 28 is 5 with a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 31100.14285
Subtracting 140 from 160 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 12:
28 can be fit into 200 7 times, resulting in a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 31100.142857
If we take 196 away from 200, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
28 can be fit into 40 1 times, resulting in a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 31100.1428571
Subtract 28 from 40 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 14:
When dividing 120 by 28, we get 4 with a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 31100.14285714
The remainder is 8 after subtracting 112 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 31100.14285714 and a remainder of 8e-09.