We're dividing 97578402 by 39 
The aim is to understand the frequency of 39 in 97578402.

On to step 1:
39 can be fit into 9 0 times, resulting in a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 39

Let's proceed to step 2:
When dividing 97 by 39, we get 2 with a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 78 from 97 to get 19.
Bring next digit (5) of the dividend behind the 19 and repeat the process: 195 / 39

Step 3:
39 goes into 195 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 25.0
The remainder is 0 after subtracting 195 from 195.
Take the next digit (7) from the dividend and append it to 0, then repeat: 7 / 39

Advancing to step 4:
If we divide 7 by 39, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 250.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 39

Advancing to step 5:
If we divide 78 by 39, we get 2 and a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 2502.0
If we take 78 away from 78, we end up with 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 39

Advancing to step 6:
If we divide 4 by 39, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 25020.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 39

Advancing to step 7:
40 divided by 39 is 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 250201.0
If we subtract 39 from 40, we get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 39

Step 8:
If we divide 12 by 39, we get 0 and a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 2502010.0
Subtract 0 from 12 to 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.

On to step 9:
39 can be fit into 120 3 times, resulting in a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 2502010.3
If we take 117 away from 120, we end up 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.

Advancing to step 10:
When dividing 30 by 39, we get 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 2502010.3
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.

Moving on to step 11:
39 goes into 300 7 times with a remainder of 27.
The next digit of our result is 7. 
Result so far: 2502010.307
If we take 273 away from 300, we end up 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.

Let's proceed to step 12:
When dividing 270 by 39, we get 6 with a remainder of 36.
Put 6 as the next digit of the answer. 
Result so far: 2502010.3076
The remainder is 36 after subtracting 234 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 13:
When dividing 360 by 39, we get 9 with a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 2502010.30769
Subtract 351 from 360 to 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 14:
39 can be fit into 90 2 times, resulting in a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 2502010.307692
The remainder is 12 after subtracting 78 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 15:
39 goes into 120 3 times with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 2502010.3076923
If we subtract 117 from 120, we get 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 16:
If we divide 30 by 39, we get 0 and a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 2502010.3076923
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 2502010.3076923, with a leftover of 3e-08.