42388691 ÷ 423 
The aim is to understand the frequency of 423 in 42388691.

Let's proceed to step 1:
423 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 423

Going ahead to step 2:
42 divided by 423 is 0 with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Append the next digit (3) from the dividend to 42 and continue with: 423 / 423

On to step 3:
423 divided by 423 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 0 after subtracting 423 from 423.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 423

Moving on to step 4:
423 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 10.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (8) from the dividend to 8 and continue with: 88 / 423

On to step 5:
When dividing 88 by 423, we get 0 with a remainder of 88.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
The remainder is 88 after subtracting 0 from 88.
Bring next digit (6) of the dividend behind the 88 and repeat the process: 886 / 423

Moving on to step 6:
886 divided by 423 is 2 with a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 1002.0
Subtracting 846 from 886 leaves us with 40.
Append the next digit (9) from the dividend to 40 and continue with: 409 / 423

Let's proceed to step 7:
423 goes into 409 0 times with a remainder of 409.
The next digit of our result is 0. 
Result so far: 10020.0
If we subtract 0 from 409, we get 409.
Grab the next digit (1) from the dividend, add it to 409, then carry on: 4091 / 423

Going ahead to step 8:
423 goes into 4091 9 times with a remainder of 284.
Put 9 as the next digit of the answer. 
Result so far: 100209.0
Subtract 3807 from 4091 to get 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 9:
423 goes into 2840 6 times with a remainder of 302.
The next digit of our result is 6. 
Result so far: 100209.6
If we subtract 2538 from 2840, we get 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

Step 10:
423 goes into 3020 7 times with a remainder of 59.
The next digit of our result is 7. 
Result so far: 100209.67
The remainder is 59 after subtracting 2961 from 3020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 11:
When dividing 590 by 423, we get 1 with a remainder of 167.
Put 1 as the next digit of the answer. 
Result so far: 100209.671
If we take 423 away from 590, we end up with 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

On to step 12:
423 can be fit into 1670 3 times, resulting in a remainder of 401.
Put 3 as the next digit of the answer. 
Result so far: 100209.6713
Deduct 1269 from 1670 and we're left with 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

Moving on to step 13:
4010 divided by 423 is 9 with a remainder of 203.
The next digit of our result is 9. 
Result so far: 100209.67139
The remainder is 203 after subtracting 3807 from 4010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Advancing to step 14:
423 can be fit into 2030 4 times, resulting in a remainder of 338.
Record the quotient 4 as the next digit in the result. 
Result so far: 100209.671394
Deduct 1692 from 2030 and we're left with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Going ahead to step 15:
423 can be fit into 3380 7 times, resulting in a remainder of 419.
The number 7 becomes the next digit in our result. 
Result so far: 100209.6713947
If we subtract 2961 from 3380, we get 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

On to step 16:
4190 divided by 423 is 9 with a remainder of 383.
Use 9 as the next digit of our solution. 
Result so far: 100209.67139479
Subtracting 3807 from 4190 leaves us with 383.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3830, and continue the process.

The quotient of the division is 100209.67139479, and the remainder is 3.83e-07.