We're dividing 56071111 by 21 
The aim is to understand the frequency of 21 in 56071111.

On to step 1:
If we divide 5 by 21, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (6) from the dividend, add it to 5, then carry on: 56 / 21

Moving on to step 2:
The number 21 fits into 56 2 times, leaving a remainder of 14.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 14 after subtracting 42 from 56.
Grab the next digit (0) from the dividend, add it to 14, then carry on: 140 / 21

Moving on to step 3:
21 goes into 140 6 times with a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 26.0
The remainder is 14 after subtracting 126 from 140.
Append the next digit (7) from the dividend to 14 and continue with: 147 / 21

On to step 4:
When dividing 147 by 21, we get 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 267.0
The remainder is 0 after subtracting 147 from 147.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 21

Moving on to step 5:
1 divided by 21 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 2670.0
Subtract 0 from 1 to get 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 21

Step 6:
The number 21 fits into 11 0 times, leaving a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 26700.0
If we subtract 0 from 11, we get 11.
Include the next digit (1) from the dividend after 11, then repeat: 111 / 21

Going ahead to step 7:
When dividing 111 by 21, we get 5 with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 267005.0
Subtracting 105 from 111 leaves us with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 21

Let's proceed to step 8:
When dividing 61 by 21, we get 2 with a remainder of 19.
The next digit of our result is 2. 
Result so far: 2670052.0
The remainder is 19 after subtracting 42 from 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 9:
21 goes into 190 9 times with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 2670052.9
If we take 189 away from 190, we end up 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.

Advancing to step 10:
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: 2670052.9
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 11:
If we divide 100 by 21, we get 4 and a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 2670052.904
If we take 84 away from 100, we end up 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 12:
21 goes into 160 7 times with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 2670052.9047
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.

Moving on to step 13:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 2670052.90476
Subtract 126 from 130 to 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 14:
If we divide 40 by 21, we get 1 and a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 2670052.904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 15:
21 goes into 190 9 times with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 2670052.9047619
If we take 189 away from 190, we end up 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 16:
The number 21 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 2670052.9047619
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.

After the division, we end up with 2670052.9047619 and a remainder of 1e-08.