21749816 ÷ 448 
The aim is to understand the frequency of 448 in 21749816.

Let's proceed to step 1:
2 divided by 448 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 448

Moving on to step 2:
448 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Take the next digit (7) from the dividend and append it to 21, then repeat: 217 / 448

Advancing to step 3:
217 divided by 448 is 0 with a remainder of 217.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 217 leaves us with 217.
Include the next digit (4) from the dividend after 217, then repeat: 2174 / 448

Step 4:
2174 divided by 448 is 4 with a remainder of 382.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 1792 from 2174 leaves us with 382.
Append the next digit (9) from the dividend to 382 and continue with: 3829 / 448

Moving on to step 5:
The number 448 fits into 3829 8 times, leaving a remainder of 245.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
The remainder is 245 after subtracting 3584 from 3829.
Take the next digit (8) from the dividend and append it to 245, then repeat: 2458 / 448

Moving on to step 6:
2458 divided by 448 is 5 with a remainder of 218.
The next digit of our result is 5. 
Result so far: 485.0
Subtract 2240 from 2458 to get 218.
Include the next digit (1) from the dividend after 218, then repeat: 2181 / 448

On to step 7:
2181 divided by 448 is 4 with a remainder of 389.
Write down 4 as next digit of the result. 
Result so far: 4854.0
If we subtract 1792 from 2181, we get 389.
Bring next digit (6) of the dividend behind the 389 and repeat the process: 3896 / 448

Let's proceed to step 8:
448 goes into 3896 8 times with a remainder of 312.
The next digit of our result is 8. 
Result so far: 48548.0
If we take 3584 away from 3896, we end up with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Step 9:
When dividing 3120 by 448, we get 6 with a remainder of 432.
Use 6 as the next digit of our solution. 
Result so far: 48548.6
Subtracting 2688 from 3120 leaves us with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Let's proceed to step 10:
When dividing 4320 by 448, we get 9 with a remainder of 288.
Record the quotient 9 as the next digit in the result. 
Result so far: 48548.69
If we subtract 4032 from 4320, we get 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Let's proceed to step 11:
2880 divided by 448 is 6 with a remainder of 192.
Put 6 as the next digit of the answer. 
Result so far: 48548.696
Subtracting 2688 from 2880 leaves us with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Moving on to step 12:
The number 448 fits into 1920 4 times, leaving a remainder of 128.
Record the quotient 4 as the next digit in the result. 
Result so far: 48548.6964
The remainder is 128 after subtracting 1792 from 1920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Moving on to step 13:
If we divide 1280 by 448, we get 2 and a remainder of 384.
The next digit of our result is 2. 
Result so far: 48548.69642
Subtract 896 from 1280 to get 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Moving on to step 14:
448 can be fit into 3840 8 times, resulting in a remainder of 256.
Use 8 as the next digit of our solution. 
Result so far: 48548.696428
Deduct 3584 from 3840 and we're left with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Moving on to step 15:
448 goes into 2560 5 times with a remainder of 320.
Record the quotient 5 as the next digit in the result. 
Result so far: 48548.6964285
The remainder is 320 after subtracting 2240 from 2560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 16:
3200 divided by 448 is 7 with a remainder of 64.
Write down 7 as next digit of the result. 
Result so far: 48548.69642857
Subtracting 3136 from 3200 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Our division results in 48548.69642857 with a remaining 6.4e-08.