77297326 ÷ 21 
The aim is to understand the frequency of 21 in 77297326.

Moving on to step 1:
The number 21 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 21

Advancing to step 2:
77 divided by 21 is 3 with a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 63 from 77 to get 14.
Bring next digit (2) of the dividend behind the 14 and repeat the process: 142 / 21

Going ahead to step 3:
142 divided by 21 is 6 with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 36.0
Subtracting 126 from 142 leaves us with 16.
Take the next digit (9) from the dividend and append it to 16, then repeat: 169 / 21

Step 4:
When dividing 169 by 21, we get 8 with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 368.0
Subtracting 168 from 169 leaves us with 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 21

Going ahead to step 5:
17 divided by 21 is 0 with a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 3680.0
Deduct 0 from 17 and we're left with 17.
Bring next digit (3) of the dividend behind the 17 and repeat the process: 173 / 21

Going ahead to step 6:
When dividing 173 by 21, we get 8 with a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 36808.0
Subtract 168 from 173 to get 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 21

Let's proceed to step 7:
52 divided by 21 is 2 with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 368082.0
If we subtract 42 from 52, we get 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 21

On to step 8:
When dividing 106 by 21, we get 5 with a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 3680825.0
Subtract 105 from 106 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
21 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 3680825.0
If we take 0 away from 10, we end up 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.

Advancing to step 10:
If we divide 100 by 21, we get 4 and a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 3680825.04
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
When dividing 160 by 21, we get 7 with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 3680825.047
Subtract 147 from 160 to get 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 12:
When dividing 130 by 21, we get 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 3680825.0476
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.

Advancing to step 13:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 3680825.04761
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 can be fit into 190 9 times, resulting in a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 3680825.047619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 15:
21 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 3680825.047619
Subtract 0 from 10 to 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.

Moving on to step 16:
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: 3680825.04761904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

After the division, we end up with 3680825.04761904 and a remainder of 1.6e-08.