636403 divided by 27 
The aim is to understand the frequency of 27 in 636403.

On to step 1:
6 divided by 27 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 27

Advancing to step 2:
27 goes into 63 2 times with a remainder of 9.
The next digit of our result is 2. 
Result so far: 2.0
If we take 54 away from 63, we end up with 9.
Fetch the next digit (6) from the dividend, attach it to 9 and continue: 96 / 27

Moving on to step 3:
27 goes into 96 3 times with a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
Deduct 81 from 96 and we're left with 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 27

Going ahead to step 4:
27 can be fit into 154 5 times, resulting in a remainder of 19.
Use 5 as the next digit of our solution. 
Result so far: 235.0
Deduct 135 from 154 and we're left with 19.
Bring next digit (0) of the dividend behind the 19 and repeat the process: 190 / 27

On to step 5:
190 divided by 27 is 7 with a remainder of 1.
The next digit of our result is 7. 
Result so far: 2357.0
If we subtract 189 from 190, we get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 27

On to step 6:
27 can be fit into 13 0 times, resulting in a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 23570.0
Subtract 0 from 13 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 7:
When dividing 130 by 27, we get 4 with a remainder of 22.
Record the quotient 4 as the next digit in the result. 
Result so far: 23570.4
The remainder is 22 after subtracting 108 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 8:
The number 27 fits into 220 8 times, leaving a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 23570.48
If we subtract 216 from 220, 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.

Step 9:
27 goes into 40 1 times with a remainder of 13.
The number 1 becomes the next digit in our result. 
Result so far: 23570.481
If we subtract 27 from 40, we 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.

Advancing to step 10:
The number 27 fits into 130 4 times, leaving a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 23570.4814
Deduct 108 from 130 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 11:
When dividing 220 by 27, we get 8 with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 23570.48148
Subtracting 216 from 220 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.

Going ahead to step 12:
If we divide 40 by 27, we get 1 and a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 23570.481481
If we subtract 27 from 40, we 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.

On to step 13:
130 divided by 27 is 4 with a remainder of 22.
The next digit of our result is 4. 
Result so far: 23570.4814814
Subtract 108 from 130 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 14:
If we divide 220 by 27, we get 8 and a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 23570.48148148
If we subtract 216 from 220, 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.

After the division, we end up with 23570.48148148 and a remainder of 4e-09.