23942437 ÷ 721 
The aim is to understand the frequency of 721 in 23942437.

On to step 1:
2 divided by 721 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 721

Moving on to step 2:
721 can be fit into 23 0 times, resulting in a remainder of 23.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 23, we end up with 23.
Bring next digit (9) of the dividend behind the 23 and repeat the process: 239 / 721

Step 3:
721 can be fit into 239 0 times, resulting in a remainder of 239.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 239, we end up with 239.
Include the next digit (4) from the dividend after 239, then repeat: 2394 / 721

Step 4:
721 goes into 2394 3 times with a remainder of 231.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 2163 away from 2394, we end up with 231.
Include the next digit (2) from the dividend after 231, then repeat: 2312 / 721

Step 5:
721 goes into 2312 3 times with a remainder of 149.
Write down 3 as next digit of the result. 
Result so far: 33.0
The remainder is 149 after subtracting 2163 from 2312.
Fetch the next digit (4) from the dividend, attach it to 149 and continue: 1494 / 721

Step 6:
1494 divided by 721 is 2 with a remainder of 52.
The number 2 becomes the next digit in our result. 
Result so far: 332.0
Subtract 1442 from 1494 to get 52.
Include the next digit (3) from the dividend after 52, then repeat: 523 / 721

Let's proceed to step 7:
The number 721 fits into 523 0 times, leaving a remainder of 523.
The number 0 becomes the next digit in our result. 
Result so far: 3320.0
Deduct 0 from 523 and we're left with 523.
Bring next digit (7) of the dividend behind the 523 and repeat the process: 5237 / 721

Advancing to step 8:
The number 721 fits into 5237 7 times, leaving a remainder of 190.
The number 7 becomes the next digit in our result. 
Result so far: 33207.0
Subtracting 5047 from 5237 leaves us 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.

On to step 9:
The number 721 fits into 1900 2 times, leaving a remainder of 458.
Use 2 as the next digit of our solution. 
Result so far: 33207.2
The remainder is 458 after subtracting 1442 from 1900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

On to step 10:
When dividing 4580 by 721, we get 6 with a remainder of 254.
Use 6 as the next digit of our solution. 
Result so far: 33207.26
Subtracting 4326 from 4580 leaves us with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Advancing to step 11:
The number 721 fits into 2540 3 times, leaving a remainder of 377.
The number 3 becomes the next digit in our result. 
Result so far: 33207.263
Deduct 2163 from 2540 and we're left with 377.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3770, and continue the process.

Advancing to step 12:
721 goes into 3770 5 times with a remainder of 165.
Write down 5 as next digit of the result. 
Result so far: 33207.2635
If we take 3605 away from 3770, we end up with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Moving on to step 13:
If we divide 1650 by 721, we get 2 and a remainder of 208.
Put 2 as the next digit of the answer. 
Result so far: 33207.26352
Subtracting 1442 from 1650 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

On to step 14:
If we divide 2080 by 721, we get 2 and a remainder of 638.
The next digit of our result is 2. 
Result so far: 33207.263522
The remainder is 638 after subtracting 1442 from 2080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6380, and continue the process.

In conclusion, the division gives 33207.263522 with a balance of 6.38e-05.