We divide 78309 by 39
The aim is to understand the frequency of 39 in 78309.

Let's proceed to step 1:
If we divide 7 by 39, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 39

Moving on to step 2:
When dividing 78 by 39, we get 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 78 from 78 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 39

Let's proceed to step 3:
39 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 39

Going ahead to step 4:
When dividing 30 by 39, we get 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 200.0
If we subtract 0 from 30, we get 30.
Fetch the next digit (9) from the dividend, attach it to 30 and continue: 309 / 39

Moving on to step 5:
39 goes into 309 7 times with a remainder of 36.
Record the quotient 7 as the next digit in the result. 
Result so far: 2007.0
Deduct 273 from 309 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 6:
360 divided by 39 is 9 with a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 2007.9
If we subtract 351 from 360, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
90 divided by 39 is 2 with a remainder of 12.
The next digit of our result is 2. 
Result so far: 2007.92
If we subtract 78 from 90, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
39 can be fit into 120 3 times, resulting in a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 2007.923
Deduct 117 from 120 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 9:
39 can be fit into 30 0 times, resulting in a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 2007.923
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 10:
39 can be fit into 300 7 times, resulting in a remainder of 27.
Write down 7 as next digit of the result. 
Result so far: 2007.92307
Subtracting 273 from 300 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 11:
The number 39 fits into 270 6 times, leaving a remainder of 36.
Put 6 as the next digit of the answer. 
Result so far: 2007.923076
Subtract 234 from 270 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 12:
360 divided by 39 is 9 with a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 2007.9230769
If we take 351 away from 360, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 13:
39 can be fit into 90 2 times, resulting in a remainder of 12.
The next digit of our result is 2. 
Result so far: 2007.92307692
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 2007.92307692 with a remaining 1.2e-08.