We divide 752077 by 21
The aim is to understand the frequency of 21 in 752077.

Step 1:
21 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 21

Moving on to step 2:
If we divide 75 by 21, we get 3 and a remainder of 12.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 63 from 75 to get 12.
Take the next digit (2) from the dividend and append it to 12, then repeat: 122 / 21

Advancing to step 3:
21 goes into 122 5 times with a remainder of 17.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
If we take 105 away from 122, we end up with 17.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 21

On to step 4:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 358.0
If we subtract 168 from 170, we get 2.
Include the next digit (7) from the dividend after 2, then repeat: 27 / 21

Moving on to step 5:
If we divide 27 by 21, we get 1 and a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 3581.0
Subtract 21 from 27 to get 6.
Fetch the next digit (7) from the dividend, attach it to 6 and continue: 67 / 21

Step 6:
21 can be fit into 67 3 times, resulting in a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 35813.0
If we subtract 63 from 67, 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.

Let's proceed to step 7:
40 divided by 21 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 35813.1
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 8:
21 can be fit into 190 9 times, resulting in a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 35813.19
Subtracting 189 from 190 leaves us 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.

Moving on to step 9:
When dividing 10 by 21, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 35813.19
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
When dividing 100 by 21, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 35813.1904
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.

Going ahead to step 11:
21 can be fit into 160 7 times, resulting in a remainder of 13.
The next digit of our result is 7. 
Result so far: 35813.19047
Subtracting 147 from 160 leaves us 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.

On to step 12:
21 goes into 130 6 times with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 35813.190476
Subtracting 126 from 130 leaves us with 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 13:
If we divide 40 by 21, we get 1 and a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 35813.1904761
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.

Advancing to step 14:
21 goes into 190 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 35813.19047619
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.

Our division results in 35813.19047619 with a remaining 1e-09.