We're dividing 810400 by 27 
The aim is to understand the frequency of 27 in 810400.

On to step 1:
27 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 27

Advancing to step 2:
If we divide 81 by 27, we get 3 and a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 81 from 81, we get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 27

Advancing to step 3:
0 divided by 27 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 30.0
The remainder is 0 after subtracting 0 from 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 27

Let's proceed to step 4:
The number 27 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 300.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 27

Going ahead to step 5:
The number 27 fits into 40 1 times, leaving a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 3001.0
Deduct 27 from 40 and we're left with 13.
Fetch the next digit (0) from the dividend, attach it to 13 and continue: 130 / 27

On to step 6:
130 divided by 27 is 4 with a remainder of 22.
The next digit of our result is 4. 
Result so far: 30014.0
Subtracting 108 from 130 leaves us 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.

Let's proceed to step 7:
27 goes into 220 8 times with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 30014.8
Deduct 216 from 220 and we're left 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.

Step 8:
27 can be fit into 40 1 times, resulting in a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 30014.81
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.

Let's proceed to step 9:
The number 27 fits into 130 4 times, leaving a remainder of 22.
Write down 4 as next digit of the result. 
Result so far: 30014.814
If we subtract 108 from 130, we 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.

Advancing to step 10:
27 can be fit into 220 8 times, resulting in a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 30014.8148
If we take 216 away from 220, we end up 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.

Let's proceed to step 11:
When dividing 40 by 27, we get 1 with a remainder of 13.
The next digit of our result is 1. 
Result so far: 30014.81481
The remainder is 13 after subtracting 27 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 12:
When dividing 130 by 27, we get 4 with a remainder of 22.
The number 4 becomes the next digit in our result. 
Result so far: 30014.814814
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 13:
27 goes into 220 8 times with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 30014.8148148
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.

Moving on to step 14:
When dividing 40 by 27, we get 1 with a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 30014.81481481
Subtracting 27 from 40 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.

The final outcome is 30014.81481481, with a leftover of 1.3e-08.