We're dividing 21400 by 63 
The aim is to understand the frequency of 63 in 21400.

Moving on to step 1:
2 divided by 63 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 63

Step 2:
If we divide 21 by 63, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Grab the next digit (4) from the dividend, add it to 21, then carry on: 214 / 63

Step 3:
63 can be fit into 214 3 times, resulting in a remainder of 25.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 189 from 214 to get 25.
Append the next digit (0) from the dividend to 25 and continue with: 250 / 63

Step 4:
The number 63 fits into 250 3 times, leaving a remainder of 61.
Use 3 as the next digit of our solution. 
Result so far: 33.0
The remainder is 61 after subtracting 189 from 250.
Fetch the next digit (0) from the dividend, attach it to 61 and continue: 610 / 63

Advancing to step 5:
When dividing 610 by 63, we get 9 with a remainder of 43.
Use 9 as the next digit of our solution. 
Result so far: 339.0
Deduct 567 from 610 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 6:
The number 63 fits into 430 6 times, leaving a remainder of 52.
Use 6 as the next digit of our solution. 
Result so far: 339.6
The remainder is 52 after subtracting 378 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 7:
520 divided by 63 is 8 with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 339.68
Subtracting 504 from 520 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 8:
If we divide 160 by 63, we get 2 and a remainder of 34.
Put 2 as the next digit of the answer. 
Result so far: 339.682
The remainder is 34 after subtracting 126 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 9:
When dividing 340 by 63, we get 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 339.6825
Subtracting 315 from 340 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 10:
When dividing 250 by 63, we get 3 with a remainder of 61.
Put 3 as the next digit of the answer. 
Result so far: 339.68253
Subtracting 189 from 250 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 11:
When dividing 610 by 63, we get 9 with a remainder of 43.
The next digit of our result is 9. 
Result so far: 339.682539
Deduct 567 from 610 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 12:
The number 63 fits into 430 6 times, leaving a remainder of 52.
Put 6 as the next digit of the answer. 
Result so far: 339.6825396
If we subtract 378 from 430, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 13:
63 can be fit into 520 8 times, resulting in a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 339.68253968
Deduct 504 from 520 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 339.68253968 with a remaining 1.6e-08.