43523008 divided by 397 
The aim is to understand the frequency of 397 in 43523008.

Moving on to step 1:
The number 397 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 397

On to step 2:
43 divided by 397 is 0 with a remainder of 43.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Fetch the next digit (5) from the dividend, attach it to 43 and continue: 435 / 397

Going ahead to step 3:
If we divide 435 by 397, we get 1 and a remainder of 38.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 397 from 435 to get 38.
Fetch the next digit (2) from the dividend, attach it to 38 and continue: 382 / 397

Let's proceed to step 4:
397 goes into 382 0 times with a remainder of 382.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 382, we get 382.
Take the next digit (3) from the dividend and append it to 382, then repeat: 3823 / 397

On to step 5:
If we divide 3823 by 397, we get 9 and a remainder of 250.
Use 9 as the next digit of our solution. 
Result so far: 109.0
Subtracting 3573 from 3823 leaves us with 250.
Include the next digit (0) from the dividend after 250, then repeat: 2500 / 397

Let's proceed to step 6:
If we divide 2500 by 397, we get 6 and a remainder of 118.
Use 6 as the next digit of our solution. 
Result so far: 1096.0
If we subtract 2382 from 2500, we get 118.
Append the next digit (0) from the dividend to 118 and continue with: 1180 / 397

Moving on to step 7:
1180 divided by 397 is 2 with a remainder of 386.
Write down 2 as next digit of the result. 
Result so far: 10962.0
If we subtract 794 from 1180, we get 386.
Fetch the next digit (8) from the dividend, attach it to 386 and continue: 3868 / 397

Let's proceed to step 8:
The number 397 fits into 3868 9 times, leaving a remainder of 295.
Record the quotient 9 as the next digit in the result. 
Result so far: 109629.0
Subtract 3573 from 3868 to get 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

On to step 9:
When dividing 2950 by 397, we get 7 with a remainder of 171.
The number 7 becomes the next digit in our result. 
Result so far: 109629.7
If we subtract 2779 from 2950, we get 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Step 10:
397 goes into 1710 4 times with a remainder of 122.
The next digit of our result is 4. 
Result so far: 109629.74
Subtract 1588 from 1710 to get 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Let's proceed to step 11:
The number 397 fits into 1220 3 times, leaving a remainder of 29.
Put 3 as the next digit of the answer. 
Result so far: 109629.743
Subtracting 1191 from 1220 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 12:
If we divide 290 by 397, we get 0 and a remainder of 290.
The next digit of our result is 0. 
Result so far: 109629.743
If we take 0 away from 290, we end up with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Let's proceed to step 13:
If we divide 2900 by 397, we get 7 and a remainder of 121.
Put 7 as the next digit of the answer. 
Result so far: 109629.74307
Subtract 2779 from 2900 to get 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

On to step 14:
397 goes into 1210 3 times with a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 109629.743073
Subtracting 1191 from 1210 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 15:
If we divide 190 by 397, we get 0 and a remainder of 190.
Put 0 as the next digit of the answer. 
Result so far: 109629.743073
Deduct 0 from 190 and we're left with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Advancing to step 16:
When dividing 1900 by 397, we get 4 with a remainder of 312.
The number 4 becomes the next digit in our result. 
Result so far: 109629.74307304
Subtract 1588 from 1900 to get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

After the division, we end up with 109629.74307304 and a remainder of 3.12e-07.