We're dividing 67489452 by 399 
The aim is to understand the frequency of 399 in 67489452.

Let's proceed to step 1:
399 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (7) of the dividend behind the 6 and repeat the process: 67 / 399

Going ahead to step 2:
When dividing 67 by 399, we get 0 with a remainder of 67.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 67 after subtracting 0 from 67.
Append the next digit (4) from the dividend to 67 and continue with: 674 / 399

Let's proceed to step 3:
If we divide 674 by 399, we get 1 and a remainder of 275.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 399 from 674 and we're left with 275.
Include the next digit (8) from the dividend after 275, then repeat: 2758 / 399

Let's proceed to step 4:
399 can be fit into 2758 6 times, resulting in a remainder of 364.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Deduct 2394 from 2758 and we're left with 364.
Include the next digit (9) from the dividend after 364, then repeat: 3649 / 399

Going ahead to step 5:
When dividing 3649 by 399, we get 9 with a remainder of 58.
The next digit of our result is 9. 
Result so far: 169.0
Subtracting 3591 from 3649 leaves us with 58.
Append the next digit (4) from the dividend to 58 and continue with: 584 / 399

Moving on to step 6:
The number 399 fits into 584 1 times, leaving a remainder of 185.
The next digit of our result is 1. 
Result so far: 1691.0
If we take 399 away from 584, we end up with 185.
Fetch the next digit (5) from the dividend, attach it to 185 and continue: 1855 / 399

Going ahead to step 7:
The number 399 fits into 1855 4 times, leaving a remainder of 259.
Use 4 as the next digit of our solution. 
Result so far: 16914.0
If we take 1596 away from 1855, we end up with 259.
Bring next digit (2) of the dividend behind the 259 and repeat the process: 2592 / 399

Step 8:
2592 divided by 399 is 6 with a remainder of 198.
Put 6 as the next digit of the answer. 
Result so far: 169146.0
Subtracting 2394 from 2592 leaves us with 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

On to step 9:
399 goes into 1980 4 times with a remainder of 384.
The next digit of our result is 4. 
Result so far: 169146.4
Subtracting 1596 from 1980 leaves us with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Step 10:
399 can be fit into 3840 9 times, resulting in a remainder of 249.
Put 9 as the next digit of the answer. 
Result so far: 169146.49
The remainder is 249 after subtracting 3591 from 3840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

Step 11:
The number 399 fits into 2490 6 times, leaving a remainder of 96.
The number 6 becomes the next digit in our result. 
Result so far: 169146.496
If we take 2394 away from 2490, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 12:
The number 399 fits into 960 2 times, leaving a remainder of 162.
Use 2 as the next digit of our solution. 
Result so far: 169146.4962
The remainder is 162 after subtracting 798 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Advancing to step 13:
When dividing 1620 by 399, we get 4 with a remainder of 24.
The next digit of our result is 4. 
Result so far: 169146.49624
Subtracting 1596 from 1620 leaves us 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:
When dividing 240 by 399, we get 0 with a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 169146.49624
Subtracting 0 from 240 leaves us 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.

On to step 15:
399 goes into 2400 6 times with a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 169146.4962406
Subtracting 2394 from 2400 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 16:
The number 399 fits into 60 0 times, leaving a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 169146.4962406
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final outcome is 169146.4962406, with a leftover of 6e-08.