Let's divide 403221 by 16
The aim is to understand the frequency of 16 in 403221.

Let's proceed to step 1:
If we divide 4 by 16, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 16

Advancing to step 2:
16 goes into 40 2 times with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 32 from 40 leaves us with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 16

Step 3:
16 goes into 83 5 times with a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Deduct 80 from 83 and we're left with 3.
Grab the next digit (2) from the dividend, add it to 3, then carry on: 32 / 16

On to step 4:
16 goes into 32 2 times with a remainder of 0.
The next digit of our result is 2. 
Result so far: 252.0
If we take 32 away from 32, we end up with 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 16

On to step 5:
When dividing 2 by 16, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 2520.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 16

Moving on to step 6:
21 divided by 16 is 1 with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 25201.0
If we subtract 16 from 21, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 7:
The number 16 fits into 50 3 times, leaving a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 25201.3
Deduct 48 from 50 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
20 divided by 16 is 1 with a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 25201.31
Subtracting 16 from 20 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.

On to step 9:
16 can be fit into 40 2 times, resulting in a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 25201.312
If we subtract 32 from 40, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 10:
80 divided by 16 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 25201.3125
Subtract 80 from 80 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 11:
The number 16 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 25201.3125
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
If we divide 0 by 16, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 25201.3125
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 25201.3125 with a remaining 0.0.