21477 ÷ 39 
The aim is to understand the frequency of 39 in 21477.

Moving on to step 1:
2 divided by 39 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 39

On to step 2:
21 divided by 39 is 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Grab the next digit (4) from the dividend, add it to 21, then carry on: 214 / 39

Let's proceed to step 3:
The number 39 fits into 214 5 times, leaving a remainder of 19.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 195 from 214 leaves us with 19.
Include the next digit (7) from the dividend after 19, then repeat: 197 / 39

Going ahead to step 4:
39 goes into 197 5 times with a remainder of 2.
Record the quotient 5 as the next digit in the result. 
Result so far: 55.0
If we subtract 195 from 197, we get 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 39

Let's proceed to step 5:
27 divided by 39 is 0 with a remainder of 27.
Use 0 as the next digit of our solution. 
Result so far: 550.0
Subtract 0 from 27 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 6:
270 divided by 39 is 6 with a remainder of 36.
The next digit of our result is 6. 
Result so far: 550.6
Deduct 234 from 270 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 7:
The number 39 fits into 360 9 times, leaving a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 550.69
Subtract 351 from 360 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 8:
39 goes into 90 2 times with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 550.692
If we take 78 away from 90, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
When dividing 120 by 39, we get 3 with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 550.6923
Deduct 117 from 120 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 10:
39 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 550.6923
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
39 goes into 300 7 times with a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 550.692307
Subtract 273 from 300 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 12:
270 divided by 39 is 6 with a remainder of 36.
The next digit of our result is 6. 
Result so far: 550.6923076
Deduct 234 from 270 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 13:
When dividing 360 by 39, we get 9 with a remainder of 9.
The next digit of our result is 9. 
Result so far: 550.69230769
Subtract 351 from 360 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Our division results in 550.69230769 with a remaining 9e-09.