We're dividing 43785672 by 171 
The aim is to understand the frequency of 171 in 43785672.

On to step 1:
4 divided by 171 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 171

Moving on to step 2:
If we divide 43 by 171, we get 0 and a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Grab the next digit (7) from the dividend, add it to 43, then carry on: 437 / 171

Going ahead to step 3:
When dividing 437 by 171, we get 2 with a remainder of 95.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 342 from 437 leaves us with 95.
Bring next digit (8) of the dividend behind the 95 and repeat the process: 958 / 171

On to step 4:
171 can be fit into 958 5 times, resulting in a remainder of 103.
Use 5 as the next digit of our solution. 
Result so far: 25.0
If we take 855 away from 958, we end up with 103.
Append the next digit (5) from the dividend to 103 and continue with: 1035 / 171

Let's proceed to step 5:
171 can be fit into 1035 6 times, resulting in a remainder of 9.
Use 6 as the next digit of our solution. 
Result so far: 256.0
Deduct 1026 from 1035 and we're left with 9.
Append the next digit (6) from the dividend to 9 and continue with: 96 / 171

On to step 6:
171 can be fit into 96 0 times, resulting in a remainder of 96.
Put 0 as the next digit of the answer. 
Result so far: 2560.0
Subtract 0 from 96 to get 96.
Grab the next digit (7) from the dividend, add it to 96, then carry on: 967 / 171

Going ahead to step 7:
The number 171 fits into 967 5 times, leaving a remainder of 112.
Record the quotient 5 as the next digit in the result. 
Result so far: 25605.0
If we take 855 away from 967, we end up with 112.
Include the next digit (2) from the dividend after 112, then repeat: 1122 / 171

Going ahead to step 8:
If we divide 1122 by 171, we get 6 and a remainder of 96.
The number 6 becomes the next digit in our result. 
Result so far: 256056.0
If we subtract 1026 from 1122, we get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Let's proceed to step 9:
171 can be fit into 960 5 times, resulting in a remainder of 105.
Use 5 as the next digit of our solution. 
Result so far: 256056.5
If we subtract 855 from 960, we get 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Going ahead to step 10:
When dividing 1050 by 171, we get 6 with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 256056.56
If we subtract 1026 from 1050, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 11:
171 goes into 240 1 times with a remainder of 69.
The number 1 becomes the next digit in our result. 
Result so far: 256056.561
If we take 171 away from 240, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Let's proceed to step 12:
690 divided by 171 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 256056.5614
Subtract 684 from 690 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 13:
When dividing 60 by 171, we get 0 with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 256056.5614
Deduct 0 from 60 and we're left 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.

Step 14:
171 can be fit into 600 3 times, resulting in a remainder of 87.
Write down 3 as next digit of the result. 
Result so far: 256056.561403
Subtract 513 from 600 to get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Advancing to step 15:
The number 171 fits into 870 5 times, leaving a remainder of 15.
The next digit of our result is 5. 
Result so far: 256056.5614035
Subtracting 855 from 870 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 16:
171 can be fit into 150 0 times, resulting in a remainder of 150.
Use 0 as the next digit of our solution. 
Result so far: 256056.5614035
If we take 0 away from 150, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

The final result is 256056.5614035 with a remainder of 1.5e-07.