Let's divide 38516155 by 321
The aim is to understand the frequency of 321 in 38516155.

On to step 1:
321 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 321

Let's proceed to step 2:
321 goes into 38 0 times with a remainder of 38.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 38 to get 38.
Grab the next digit (5) from the dividend, add it to 38, then carry on: 385 / 321

Let's proceed to step 3:
The number 321 fits into 385 1 times, leaving a remainder of 64.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 321 from 385 and we're left with 64.
Grab the next digit (1) from the dividend, add it to 64, then carry on: 641 / 321

Moving on to step 4:
641 divided by 321 is 1 with a remainder of 320.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 321 away from 641, we end up with 320.
Fetch the next digit (6) from the dividend, attach it to 320 and continue: 3206 / 321

Moving on to step 5:
When dividing 3206 by 321, we get 9 with a remainder of 317.
Write down 9 as next digit of the result. 
Result so far: 119.0
Subtracting 2889 from 3206 leaves us with 317.
Grab the next digit (1) from the dividend, add it to 317, then carry on: 3171 / 321

Moving on to step 6:
321 can be fit into 3171 9 times, resulting in a remainder of 282.
Put 9 as the next digit of the answer. 
Result so far: 1199.0
The remainder is 282 after subtracting 2889 from 3171.
Append the next digit (5) from the dividend to 282 and continue with: 2825 / 321

Let's proceed to step 7:
If we divide 2825 by 321, we get 8 and a remainder of 257.
The next digit of our result is 8. 
Result so far: 11998.0
The remainder is 257 after subtracting 2568 from 2825.
Include the next digit (5) from the dividend after 257, then repeat: 2575 / 321

Going ahead to step 8:
2575 divided by 321 is 8 with a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 119988.0
Subtract 2568 from 2575 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 9:
When dividing 70 by 321, we get 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 119988.0
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 10:
700 divided by 321 is 2 with a remainder of 58.
The next digit of our result is 2. 
Result so far: 119988.02
If we take 642 away from 700, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 11:
When dividing 580 by 321, we get 1 with a remainder of 259.
Record the quotient 1 as the next digit in the result. 
Result so far: 119988.021
Subtracting 321 from 580 leaves us with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Going ahead to step 12:
2590 divided by 321 is 8 with a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 119988.0218
If we take 2568 away from 2590, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 13:
220 divided by 321 is 0 with a remainder of 220.
Record the quotient 0 as the next digit in the result. 
Result so far: 119988.0218
If we subtract 0 from 220, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Advancing to step 14:
2200 divided by 321 is 6 with a remainder of 274.
The number 6 becomes the next digit in our result. 
Result so far: 119988.021806
If we take 1926 away from 2200, we end up with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Let's proceed to step 15:
321 can be fit into 2740 8 times, resulting in a remainder of 172.
Use 8 as the next digit of our solution. 
Result so far: 119988.0218068
Deduct 2568 from 2740 and we're left with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

On to step 16:
321 goes into 1720 5 times with a remainder of 115.
Write down 5 as next digit of the result. 
Result so far: 119988.02180685
If we take 1605 away from 1720, we end up with 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

In conclusion, the division gives 119988.02180685 with a balance of 1.15e-07.