We divide 381389 by 28
The aim is to understand the frequency of 28 in 381389.

Going ahead to step 1:
When dividing 3 by 28, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 28

Let's proceed to step 2:
28 goes into 38 1 times with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 28 from 38, we get 10.
Fetch the next digit (1) from the dividend, attach it to 10 and continue: 101 / 28

Moving on to step 3:
The number 28 fits into 101 3 times, leaving a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Subtracting 84 from 101 leaves us with 17.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 28

Moving on to step 4:
When dividing 173 by 28, we get 6 with a remainder of 5.
The next digit of our result is 6. 
Result so far: 136.0
Subtract 168 from 173 to get 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 28

Step 5:
If we divide 58 by 28, we get 2 and a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 1362.0
Subtracting 56 from 58 leaves us with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 28

On to step 6:
The number 28 fits into 29 1 times, leaving a remainder of 1.
The next digit of our result is 1. 
Result so far: 13621.0
Subtract 28 from 29 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
The number 28 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 13621.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
If we divide 100 by 28, we get 3 and a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 13621.03
If we subtract 84 from 100, we 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.

Moving on to step 9:
28 can be fit into 160 5 times, resulting in a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 13621.035
The remainder is 20 after subtracting 140 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 10:
If we divide 200 by 28, we get 7 and a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 13621.0357
Subtract 196 from 200 to get 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 11:
28 goes into 40 1 times with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 13621.03571
If we take 28 away from 40, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 12:
When dividing 120 by 28, we get 4 with a remainder of 8.
The next digit of our result is 4. 
Result so far: 13621.035714
If we take 112 away from 120, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 13:
If we divide 80 by 28, we get 2 and a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 13621.0357142
Deduct 56 from 80 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 14:
The number 28 fits into 240 8 times, leaving a remainder of 16.
The next digit of our result is 8. 
Result so far: 13621.03571428
Subtracting 224 from 240 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 13621.03571428 with a remainder of 1.6e-08.