703784 divided by 21 
The aim is to understand the frequency of 21 in 703784.

Going ahead to step 1:
21 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 21

On to step 2:
70 divided by 21 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 63 from 70 to get 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 21

Moving on to step 3:
21 goes into 73 3 times with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 33.0
The remainder is 10 after subtracting 63 from 73.
Bring next digit (7) of the dividend behind the 10 and repeat the process: 107 / 21

Advancing to step 4:
When dividing 107 by 21, we get 5 with a remainder of 2.
The next digit of our result is 5. 
Result so far: 335.0
If we subtract 105 from 107, we get 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 21

Going ahead to step 5:
The number 21 fits into 28 1 times, leaving a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 3351.0
Deduct 21 from 28 and we're left with 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 21

Moving on to step 6:
21 goes into 74 3 times with a remainder of 11.
The next digit of our result is 3. 
Result so far: 33513.0
The remainder is 11 after subtracting 63 from 74.
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 number 5 becomes the next digit in our result. 
Result so far: 33513.5
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 8:
When dividing 50 by 21, we get 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 33513.52
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 9:
When dividing 80 by 21, we get 3 with a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 33513.523
If we take 63 away from 80, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 10:
21 goes into 170 8 times with a remainder of 2.
The next digit of our result is 8. 
Result so far: 33513.5238
Deduct 168 from 170 and we're left 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.

Moving on to step 11:
21 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 33513.5238
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 12:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 33513.523809
The remainder is 11 after subtracting 189 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 13:
If we divide 110 by 21, we get 5 and a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 33513.5238095
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 14:
21 can be fit into 50 2 times, resulting in a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 33513.52380952
Deduct 42 from 50 and we're left 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.

Our division results in 33513.52380952 with a remaining 8e-09.