We're dividing 112319 by 21 
The aim is to understand the frequency of 21 in 112319.

Going ahead to step 1:
21 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 21

Going ahead to step 2:
21 goes into 11 0 times with a remainder of 11.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 11 and we're left with 11.
Fetch the next digit (2) from the dividend, attach it to 11 and continue: 112 / 21

Going ahead to step 3:
The number 21 fits into 112 5 times, leaving a remainder of 7.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 105 away from 112, we end up with 7.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 21

Advancing to step 4:
73 divided by 21 is 3 with a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 53.0
Subtracting 63 from 73 leaves us with 10.
Include the next digit (1) from the dividend after 10, then repeat: 101 / 21

Advancing to step 5:
21 goes into 101 4 times with a remainder of 17.
The number 4 becomes the next digit in our result. 
Result so far: 534.0
Subtracting 84 from 101 leaves us with 17.
Bring next digit (9) of the dividend behind the 17 and repeat the process: 179 / 21

On to step 6:
179 divided by 21 is 8 with a remainder of 11.
Put 8 as the next digit of the answer. 
Result so far: 5348.0
If we subtract 168 from 179, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
110 divided by 21 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 5348.5
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
When dividing 50 by 21, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 5348.52
If we take 42 away from 50, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 9:
80 divided by 21 is 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 5348.523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 10:
When dividing 170 by 21, we get 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 5348.5238
Subtracting 168 from 170 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
21 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 5348.5238
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 12:
If we divide 200 by 21, we get 9 and a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 5348.523809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 13:
The number 21 fits into 110 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 5348.5238095
Subtracting 105 from 110 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 14:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 5348.52380952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 5348.52380952 with a remaining 8e-09.