11274104 ÷ 399 
The aim is to understand the frequency of 399 in 11274104.

Advancing to step 1:
When dividing 1 by 399, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 399

On to step 2:
399 can be fit into 11 0 times, resulting in a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 11, we get 11.
Include the next digit (2) from the dividend after 11, then repeat: 112 / 399

Advancing to step 3:
The number 399 fits into 112 0 times, leaving a remainder of 112.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 112 leaves us with 112.
Append the next digit (7) from the dividend to 112 and continue with: 1127 / 399

Step 4:
1127 divided by 399 is 2 with a remainder of 329.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 798 from 1127 to get 329.
Append the next digit (4) from the dividend to 329 and continue with: 3294 / 399

Going ahead to step 5:
When dividing 3294 by 399, we get 8 with a remainder of 102.
Use 8 as the next digit of our solution. 
Result so far: 28.0
Subtract 3192 from 3294 to get 102.
Grab the next digit (1) from the dividend, add it to 102, then carry on: 1021 / 399

Step 6:
1021 divided by 399 is 2 with a remainder of 223.
Record the quotient 2 as the next digit in the result. 
Result so far: 282.0
If we subtract 798 from 1021, we get 223.
Include the next digit (0) from the dividend after 223, then repeat: 2230 / 399

Step 7:
The number 399 fits into 2230 5 times, leaving a remainder of 235.
Record the quotient 5 as the next digit in the result. 
Result so far: 2825.0
Subtracting 1995 from 2230 leaves us with 235.
Append the next digit (4) from the dividend to 235 and continue with: 2354 / 399

Moving on to step 8:
When dividing 2354 by 399, we get 5 with a remainder of 359.
The next digit of our result is 5. 
Result so far: 28255.0
If we subtract 1995 from 2354, we get 359.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3590, and continue the process.

Advancing to step 9:
3590 divided by 399 is 8 with a remainder of 398.
Record the quotient 8 as the next digit in the result. 
Result so far: 28255.8
Subtracting 3192 from 3590 leaves us with 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Step 10:
When dividing 3980 by 399, we get 9 with a remainder of 389.
Record the quotient 9 as the next digit in the result. 
Result so far: 28255.89
Subtract 3591 from 3980 to get 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Moving on to step 11:
The number 399 fits into 3890 9 times, leaving a remainder of 299.
Put 9 as the next digit of the answer. 
Result so far: 28255.899
If we take 3591 away from 3890, we end up with 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

The quotient of the division is 28255.899, and the remainder is 0.0299.