Let's divide 99406404 by 393
The aim is to understand the frequency of 393 in 99406404.

On to step 1:
393 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 393

Moving on to step 2:
393 can be fit into 99 0 times, resulting in a remainder of 99.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Grab the next digit (4) from the dividend, add it to 99, then carry on: 994 / 393

Step 3:
393 goes into 994 2 times with a remainder of 208.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 786 from 994 to get 208.
Grab the next digit (0) from the dividend, add it to 208, then carry on: 2080 / 393

Step 4:
The number 393 fits into 2080 5 times, leaving a remainder of 115.
Use 5 as the next digit of our solution. 
Result so far: 25.0
If we subtract 1965 from 2080, we get 115.
Bring next digit (6) of the dividend behind the 115 and repeat the process: 1156 / 393

Step 5:
393 goes into 1156 2 times with a remainder of 370.
Write down 2 as next digit of the result. 
Result so far: 252.0
The remainder is 370 after subtracting 786 from 1156.
Fetch the next digit (4) from the dividend, attach it to 370 and continue: 3704 / 393

Going ahead to step 6:
393 goes into 3704 9 times with a remainder of 167.
Use 9 as the next digit of our solution. 
Result so far: 2529.0
Deduct 3537 from 3704 and we're left with 167.
Include the next digit (0) from the dividend after 167, then repeat: 1670 / 393

Let's proceed to step 7:
1670 divided by 393 is 4 with a remainder of 98.
Put 4 as the next digit of the answer. 
Result so far: 25294.0
Subtracting 1572 from 1670 leaves us with 98.
Take the next digit (4) from the dividend and append it to 98, then repeat: 984 / 393

On to step 8:
393 can be fit into 984 2 times, resulting in a remainder of 198.
Write down 2 as next digit of the result. 
Result so far: 252942.0
Deduct 786 from 984 and we're left 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.

Moving on to step 9:
393 can be fit into 1980 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 252942.5
If we subtract 1965 from 1980, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 10:
The number 393 fits into 150 0 times, leaving a remainder of 150.
Use 0 as the next digit of our solution. 
Result so far: 252942.5
Subtract 0 from 150 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 11:
When dividing 1500 by 393, we get 3 with a remainder of 321.
The number 3 becomes the next digit in our result. 
Result so far: 252942.503
Subtract 1179 from 1500 to get 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

Let's proceed to step 12:
If we divide 3210 by 393, we get 8 and a remainder of 66.
Use 8 as the next digit of our solution. 
Result so far: 252942.5038
Subtract 3144 from 3210 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 13:
393 goes into 660 1 times with a remainder of 267.
Record the quotient 1 as the next digit in the result. 
Result so far: 252942.50381
Subtracting 393 from 660 leaves us with 267.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2670, and continue the process.

Let's proceed to step 14:
If we divide 2670 by 393, we get 6 and a remainder of 312.
Record the quotient 6 as the next digit in the result. 
Result so far: 252942.503816
Subtract 2358 from 2670 to get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

On to step 15:
3120 divided by 393 is 7 with a remainder of 369.
Write down 7 as next digit of the result. 
Result so far: 252942.5038167
The remainder is 369 after subtracting 2751 from 3120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Step 16:
393 can be fit into 3690 9 times, resulting in a remainder of 153.
Record the quotient 9 as the next digit in the result. 
Result so far: 252942.50381679
If we take 3537 away from 3690, we end up with 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Our division results in 252942.50381679 with a remaining 1.53e-07.