We look at the division of 4050690 by 123 
The aim is to understand the frequency of 123 in 4050690.

Step 1:
4 divided by 123 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 123

Going ahead to step 2:
40 divided by 123 is 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 40, we end up with 40.
Fetch the next digit (5) from the dividend, attach it to 40 and continue: 405 / 123

Step 3:
123 can be fit into 405 3 times, resulting in a remainder of 36.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 369 from 405 and we're left with 36.
Grab the next digit (0) from the dividend, add it to 36, then carry on: 360 / 123

Going ahead to step 4:
360 divided by 123 is 2 with a remainder of 114.
The number 2 becomes the next digit in our result. 
Result so far: 32.0
If we take 246 away from 360, we end up with 114.
Include the next digit (6) from the dividend after 114, then repeat: 1146 / 123

On to step 5:
1146 divided by 123 is 9 with a remainder of 39.
Record the quotient 9 as the next digit in the result. 
Result so far: 329.0
If we take 1107 away from 1146, we end up with 39.
Take the next digit (9) from the dividend and append it to 39, then repeat: 399 / 123

Moving on to step 6:
The number 123 fits into 399 3 times, leaving a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 3293.0
If we take 369 away from 399, we end up with 30.
Append the next digit (0) from the dividend to 30 and continue with: 300 / 123

Step 7:
300 divided by 123 is 2 with a remainder of 54.
Record the quotient 2 as the next digit in the result. 
Result so far: 32932.0
If we take 246 away from 300, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 8:
540 divided by 123 is 4 with a remainder of 48.
Put 4 as the next digit of the answer. 
Result so far: 32932.4
Subtracting 492 from 540 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 9:
480 divided by 123 is 3 with a remainder of 111.
Put 3 as the next digit of the answer. 
Result so far: 32932.43
If we take 369 away from 480, we end up with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Advancing to step 10:
The number 123 fits into 1110 9 times, leaving a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 32932.439
Subtracting 1107 from 1110 leaves us 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.

On to step 11:
123 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 32932.439
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 12:
The number 123 fits into 300 2 times, leaving a remainder of 54.
Use 2 as the next digit of our solution. 
Result so far: 32932.43902
Subtracting 246 from 300 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 13:
The number 123 fits into 540 4 times, leaving a remainder of 48.
Use 4 as the next digit of our solution. 
Result so far: 32932.439024
Deduct 492 from 540 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 14:
123 goes into 480 3 times with a remainder of 111.
The next digit of our result is 3. 
Result so far: 32932.4390243
If we subtract 369 from 480, we get 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Let's proceed to step 15:
When dividing 1110 by 123, we get 9 with a remainder of 3.
The next digit of our result is 9. 
Result so far: 32932.43902439
Deduct 1107 from 1110 and we're left 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.

The final result is 32932.43902439 with a remainder of 3e-09.