Let's divide 36705414 by 21
The aim is to understand the frequency of 21 in 36705414.

On to step 1:
3 divided by 21 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 21

On to step 2:
The number 21 fits into 36 1 times, leaving a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 21 from 36 leaves us with 15.
Grab the next digit (7) from the dividend, add it to 15, then carry on: 157 / 21

On to step 3:
157 divided by 21 is 7 with a remainder of 10.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtract 147 from 157 to get 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 21

Step 4:
100 divided by 21 is 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 174.0
Deduct 84 from 100 and we're left with 16.
Grab the next digit (5) from the dividend, add it to 16, then carry on: 165 / 21

Advancing to step 5:
165 divided by 21 is 7 with a remainder of 18.
Use 7 as the next digit of our solution. 
Result so far: 1747.0
The remainder is 18 after subtracting 147 from 165.
Bring next digit (4) of the dividend behind the 18 and repeat the process: 184 / 21

On to step 6:
184 divided by 21 is 8 with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 17478.0
Subtract 168 from 184 to get 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 21

Step 7:
The number 21 fits into 161 7 times, leaving a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 174787.0
If we subtract 147 from 161, we get 14.
Grab the next digit (4) from the dividend, add it to 14, then carry on: 144 / 21

Moving on to step 8:
21 can be fit into 144 6 times, resulting in a remainder of 18.
The next digit of our result is 6. 
Result so far: 1747876.0
The remainder is 18 after subtracting 126 from 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 9:
180 divided by 21 is 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 1747876.8
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 10:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 1747876.85
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 11:
If we divide 150 by 21, we get 7 and a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 1747876.857
Subtract 147 from 150 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 12:
30 divided by 21 is 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1747876.8571
Subtracting 21 from 30 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 13:
When dividing 90 by 21, we get 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 1747876.85714
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 14:
The number 21 fits into 60 2 times, leaving a remainder of 18.
The next digit of our result is 2. 
Result so far: 1747876.857142
If we take 42 away from 60, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 15:
When dividing 180 by 21, we get 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 1747876.8571428
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 16:
21 goes into 120 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 1747876.85714285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 1747876.85714285 with a remainder of 1.5e-08.