We divide 493468 by 21
The aim is to understand the frequency of 21 in 493468.

Moving on to step 1:
4 divided by 21 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 21

Moving on to step 2:
When dividing 49 by 21, we get 2 with a remainder of 7.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 7 after subtracting 42 from 49.
Take the next digit (3) from the dividend and append it to 7, then repeat: 73 / 21

On to step 3:
The number 21 fits into 73 3 times, leaving a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we take 63 away from 73, we end up with 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 21

Step 4:
104 divided by 21 is 4 with a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 234.0
Subtracting 84 from 104 leaves us with 20.
Grab the next digit (6) from the dividend, add it to 20, then carry on: 206 / 21

Moving on to step 5:
21 goes into 206 9 times with a remainder of 17.
The next digit of our result is 9. 
Result so far: 2349.0
Subtract 189 from 206 to get 17.
Fetch the next digit (8) from the dividend, attach it to 17 and continue: 178 / 21

Going ahead to step 6:
21 goes into 178 8 times with a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 23498.0
If we subtract 168 from 178, 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 7:
100 divided by 21 is 4 with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 23498.4
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.

Let's proceed to step 8:
21 goes into 160 7 times with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 23498.47
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.

Step 9:
21 can be fit into 130 6 times, resulting in a remainder of 4.
The next digit of our result is 6. 
Result so far: 23498.476
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.

Let's proceed to step 10:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 23498.4761
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.

Step 11:
21 goes into 190 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 23498.47619
If we subtract 189 from 190, we 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.

Going ahead 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: 23498.47619
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.

Let's proceed to step 13:
If we divide 100 by 21, we get 4 and a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 23498.4761904
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 14:
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: 23498.47619047
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.

Our division results in 23498.47619047 with a remaining 1.3e-08.