961264 divided by 21 
The aim is to understand the frequency of 21 in 961264.

Going ahead to step 1:
If we divide 9 by 21, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (6) from the dividend, attach it to 9 and continue: 96 / 21

Let's proceed to step 2:
21 can be fit into 96 4 times, resulting in a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 84 from 96 to get 12.
Append the next digit (1) from the dividend to 12 and continue with: 121 / 21

Advancing to step 3:
If we divide 121 by 21, we get 5 and a remainder of 16.
The number 5 becomes the next digit in our result. 
Result so far: 45.0
The remainder is 16 after subtracting 105 from 121.
Include the next digit (2) from the dividend after 16, then repeat: 162 / 21

Going ahead to step 4:
21 goes into 162 7 times with a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 457.0
The remainder is 15 after subtracting 147 from 162.
Bring next digit (6) of the dividend behind the 15 and repeat the process: 156 / 21

On to step 5:
The number 21 fits into 156 7 times, leaving a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 4577.0
Subtracting 147 from 156 leaves us with 9.
Grab the next digit (4) from the dividend, add it to 9, then carry on: 94 / 21

Moving on to step 6:
The number 21 fits into 94 4 times, leaving a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 45774.0
Subtract 84 from 94 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.

Step 7:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 45774.4
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.

Step 8:
If we divide 160 by 21, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 45774.47
The remainder is 13 after subtracting 147 from 160.
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 9:
If we divide 130 by 21, we get 6 and a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 45774.476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 10:
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: 45774.4761
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.

Advancing to step 11:
If we divide 190 by 21, we get 9 and a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 45774.47619
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.

Moving on to step 12:
When dividing 10 by 21, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 45774.47619
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.

On to step 13:
100 divided by 21 is 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 45774.4761904
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 14:
21 goes into 160 7 times with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 45774.47619047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The quotient of the division is 45774.47619047, and the remainder is 1.3e-08.