99390407 divided by 320 
The aim is to understand the frequency of 320 in 99390407.

Advancing to step 1:
The number 320 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 320

Moving on to step 2:
The number 320 fits into 99 0 times, leaving a remainder of 99.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 99 after subtracting 0 from 99.
Append the next digit (3) from the dividend to 99 and continue with: 993 / 320

Let's proceed to step 3:
When dividing 993 by 320, we get 3 with a remainder of 33.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 960 from 993 leaves us with 33.
Bring next digit (9) of the dividend behind the 33 and repeat the process: 339 / 320

Step 4:
320 can be fit into 339 1 times, resulting in a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
The remainder is 19 after subtracting 320 from 339.
Grab the next digit (0) from the dividend, add it to 19, then carry on: 190 / 320

Step 5:
When dividing 190 by 320, we get 0 with a remainder of 190.
Put 0 as the next digit of the answer. 
Result so far: 310.0
Subtract 0 from 190 to get 190.
Take the next digit (4) from the dividend and append it to 190, then repeat: 1904 / 320

Let's proceed to step 6:
1904 divided by 320 is 5 with a remainder of 304.
Write down 5 as next digit of the result. 
Result so far: 3105.0
Deduct 1600 from 1904 and we're left with 304.
Include the next digit (0) from the dividend after 304, then repeat: 3040 / 320

On to step 7:
When dividing 3040 by 320, we get 9 with a remainder of 160.
Write down 9 as next digit of the result. 
Result so far: 31059.0
Subtract 2880 from 3040 to get 160.
Grab the next digit (7) from the dividend, add it to 160, then carry on: 1607 / 320

Going ahead to step 8:
320 can be fit into 1607 5 times, resulting in a remainder of 7.
The next digit of our result is 5. 
Result so far: 310595.0
If we subtract 1600 from 1607, we 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.

Going ahead to step 9:
If we divide 70 by 320, we get 0 and a remainder of 70.
The next digit of our result is 0. 
Result so far: 310595.0
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 10:
If we divide 700 by 320, we get 2 and a remainder of 60.
Record the quotient 2 as the next digit in the result. 
Result so far: 310595.02
If we take 640 away from 700, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 11:
If we divide 600 by 320, we get 1 and a remainder of 280.
The number 1 becomes the next digit in our result. 
Result so far: 310595.021
The remainder is 280 after subtracting 320 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Moving on to step 12:
The number 320 fits into 2800 8 times, leaving a remainder of 240.
Write down 8 as next digit of the result. 
Result so far: 310595.0218
Deduct 2560 from 2800 and we're left 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.

Advancing to step 13:
2400 divided by 320 is 7 with a remainder of 160.
The number 7 becomes the next digit in our result. 
Result so far: 310595.02187
If we subtract 2240 from 2400, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 14:
320 goes into 1600 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 310595.021875
Subtract 1600 from 1600 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 15:
0 divided by 320 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 310595.021875
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 16:
When dividing 0 by 320, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 310595.021875
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 310595.021875 with a balance of 0.0.