We divide 42103168 by 39
The aim is to understand the frequency of 39 in 42103168.

On to step 1:
When dividing 4 by 39, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 39

Let's proceed to step 2:
If we divide 42 by 39, we get 1 and a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 39 from 42, we get 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 39

Moving on to step 3:
39 can be fit into 31 0 times, resulting in a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 31, we end up with 31.
Take the next digit (0) from the dividend and append it to 31, then repeat: 310 / 39

Moving on to step 4:
39 can be fit into 310 7 times, resulting in a remainder of 37.
Record the quotient 7 as the next digit in the result. 
Result so far: 107.0
Deduct 273 from 310 and we're left with 37.
Append the next digit (3) from the dividend to 37 and continue with: 373 / 39

Going ahead to step 5:
If we divide 373 by 39, we get 9 and a remainder of 22.
Use 9 as the next digit of our solution. 
Result so far: 1079.0
The remainder is 22 after subtracting 351 from 373.
Bring next digit (1) of the dividend behind the 22 and repeat the process: 221 / 39

On to step 6:
39 can be fit into 221 5 times, resulting in a remainder of 26.
The number 5 becomes the next digit in our result. 
Result so far: 10795.0
Subtract 195 from 221 to get 26.
Bring next digit (6) of the dividend behind the 26 and repeat the process: 266 / 39

Going ahead to step 7:
39 goes into 266 6 times with a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 107956.0
Deduct 234 from 266 and we're left with 32.
Append the next digit (8) from the dividend to 32 and continue with: 328 / 39

Going ahead to step 8:
328 divided by 39 is 8 with a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 1079568.0
Deduct 312 from 328 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
If we divide 160 by 39, we get 4 and a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 1079568.4
The remainder is 4 after subtracting 156 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 10:
If we divide 40 by 39, we get 1 and a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1079568.41
If we take 39 away from 40, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 11:
If we divide 10 by 39, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 1079568.41
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
If we divide 100 by 39, we get 2 and a remainder of 22.
Write down 2 as next digit of the result. 
Result so far: 1079568.4102
Subtracting 78 from 100 leaves us 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.

Moving on to step 13:
When dividing 220 by 39, we get 5 with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 1079568.41025
If we take 195 away from 220, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 14:
39 can be fit into 250 6 times, resulting in a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 1079568.410256
Subtracting 234 from 250 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 15:
When dividing 160 by 39, we get 4 with a remainder of 4.
The next digit of our result is 4. 
Result so far: 1079568.4102564
The remainder is 4 after subtracting 156 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 16:
When dividing 40 by 39, we get 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1079568.41025641
If we take 39 away from 40, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

After the division, we end up with 1079568.41025641 and a remainder of 1e-09.