Let's divide 74862811 by 21
The aim is to understand the frequency of 21 in 74862811.

Advancing to step 1:
7 divided by 21 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 21

On to step 2:
74 divided by 21 is 3 with a remainder of 11.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 63 from 74 and we're left with 11.
Fetch the next digit (8) from the dividend, attach it to 11 and continue: 118 / 21

Step 3:
21 goes into 118 5 times with a remainder of 13.
Put 5 as the next digit of the answer. 
Result so far: 35.0
Deduct 105 from 118 and we're left with 13.
Fetch the next digit (6) from the dividend, attach it to 13 and continue: 136 / 21

Step 4:
21 goes into 136 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 356.0
If we take 126 away from 136, we end up with 10.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 21

Advancing to step 5:
21 can be fit into 102 4 times, resulting in a remainder of 18.
The next digit of our result is 4. 
Result so far: 3564.0
Subtract 84 from 102 to get 18.
Append the next digit (8) from the dividend to 18 and continue with: 188 / 21

Step 6:
21 goes into 188 8 times with a remainder of 20.
The next digit of our result is 8. 
Result so far: 35648.0
Subtracting 168 from 188 leaves us with 20.
Bring next digit (1) of the dividend behind the 20 and repeat the process: 201 / 21

Moving on to step 7:
The number 21 fits into 201 9 times, leaving a remainder of 12.
Put 9 as the next digit of the answer. 
Result so far: 356489.0
If we subtract 189 from 201, we get 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 21

Going ahead to step 8:
When dividing 121 by 21, we get 5 with a remainder of 16.
Write down 5 as next digit of the result. 
Result so far: 3564895.0
Deduct 105 from 121 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.

Step 9:
21 can be fit into 160 7 times, resulting in a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 3564895.7
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 10:
When dividing 130 by 21, we get 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 3564895.76
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 11:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 3564895.761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 12:
21 goes into 190 9 times with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 3564895.7619
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 13:
21 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 3564895.7619
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 14:
100 divided by 21 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 3564895.761904
Deduct 84 from 100 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.

Going ahead to step 15:
21 can be fit into 160 7 times, resulting in a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 3564895.7619047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 16:
If we divide 130 by 21, we get 6 and a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 3564895.76190476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 3564895.76190476 with a remainder of 4e-09.