We're dividing 39129107 by 432 
The aim is to understand the frequency of 432 in 39129107.

Going ahead to step 1:
When dividing 3 by 432, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 432

Let's proceed to step 2:
When dividing 39 by 432, we get 0 with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Grab the next digit (1) from the dividend, add it to 39, then carry on: 391 / 432

On to step 3:
If we divide 391 by 432, we get 0 and a remainder of 391.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 391, we end up with 391.
Grab the next digit (2) from the dividend, add it to 391, then carry on: 3912 / 432

Let's proceed to step 4:
432 can be fit into 3912 9 times, resulting in a remainder of 24.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 3888 from 3912 to get 24.
Take the next digit (9) from the dividend and append it to 24, then repeat: 249 / 432

Going ahead to step 5:
When dividing 249 by 432, we get 0 with a remainder of 249.
Write down 0 as next digit of the result. 
Result so far: 90.0
If we subtract 0 from 249, we get 249.
Bring next digit (1) of the dividend behind the 249 and repeat the process: 2491 / 432

Advancing to step 6:
432 can be fit into 2491 5 times, resulting in a remainder of 331.
The next digit of our result is 5. 
Result so far: 905.0
If we take 2160 away from 2491, we end up with 331.
Append the next digit (0) from the dividend to 331 and continue with: 3310 / 432

Moving on to step 7:
If we divide 3310 by 432, we get 7 and a remainder of 286.
Put 7 as the next digit of the answer. 
Result so far: 9057.0
Deduct 3024 from 3310 and we're left with 286.
Bring next digit (7) of the dividend behind the 286 and repeat the process: 2867 / 432

Let's proceed to step 8:
The number 432 fits into 2867 6 times, leaving a remainder of 275.
Record the quotient 6 as the next digit in the result. 
Result so far: 90576.0
Subtract 2592 from 2867 to get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Going ahead to step 9:
The number 432 fits into 2750 6 times, leaving a remainder of 158.
Put 6 as the next digit of the answer. 
Result so far: 90576.6
Subtracting 2592 from 2750 leaves us with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Let's proceed to step 10:
If we divide 1580 by 432, we get 3 and a remainder of 284.
The next digit of our result is 3. 
Result so far: 90576.63
If we take 1296 away from 1580, we end up with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Moving on to step 11:
The number 432 fits into 2840 6 times, leaving a remainder of 248.
The next digit of our result is 6. 
Result so far: 90576.636
Subtract 2592 from 2840 to get 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Advancing to step 12:
432 can be fit into 2480 5 times, resulting in a remainder of 320.
Use 5 as the next digit of our solution. 
Result so far: 90576.6365
The remainder is 320 after subtracting 2160 from 2480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 13:
3200 divided by 432 is 7 with a remainder of 176.
The next digit of our result is 7. 
Result so far: 90576.63657
If we take 3024 away from 3200, we end up with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

On to step 14:
1760 divided by 432 is 4 with a remainder of 32.
The next digit of our result is 4. 
Result so far: 90576.636574
The remainder is 32 after subtracting 1728 from 1760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 15:
432 can be fit into 320 0 times, resulting in a remainder of 320.
Put 0 as the next digit of the answer. 
Result so far: 90576.636574
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 16:
When dividing 3200 by 432, we get 7 with a remainder of 176.
Write down 7 as next digit of the result. 
Result so far: 90576.63657407
Subtract 3024 from 3200 to get 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

The final outcome is 90576.63657407, with a leftover of 1.76e-07.