543220 divided by 13 
The aim is to understand the frequency of 13 in 543220.

On to step 1:
13 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 13

On to step 2:
If we divide 54 by 13, we get 4 and a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 52 from 54 leaves us with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 13

Step 3:
If we divide 23 by 13, we get 1 and a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
The remainder is 10 after subtracting 13 from 23.
Append the next digit (2) from the dividend to 10 and continue with: 102 / 13

Advancing to step 4:
102 divided by 13 is 7 with a remainder of 11.
The next digit of our result is 7. 
Result so far: 417.0
Subtracting 91 from 102 leaves us with 11.
Append the next digit (2) from the dividend to 11 and continue with: 112 / 13

Step 5:
13 can be fit into 112 8 times, resulting in a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 4178.0
Deduct 104 from 112 and we're left with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 13

Step 6:
13 goes into 80 6 times with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 41786.0
If we take 78 away from 80, we end up 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 7:
The number 13 fits into 20 1 times, leaving a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 41786.1
If we subtract 13 from 20, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 8:
When dividing 70 by 13, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 41786.15
Subtract 65 from 70 to 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.

Going ahead to step 9:
When dividing 50 by 13, we get 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 41786.153
Subtracting 39 from 50 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 10:
13 can be fit into 110 8 times, resulting in a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 41786.1538
If we take 104 away from 110, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 11:
If we divide 60 by 13, we get 4 and a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 41786.15384
Subtract 52 from 60 to 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.

Step 12:
If we divide 80 by 13, we get 6 and a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 41786.153846
If we take 78 away from 80, we end up 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.

On to step 13:
20 divided by 13 is 1 with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 41786.1538461
Subtracting 13 from 20 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 14:
13 can be fit into 70 5 times, resulting in a remainder of 5.
The next digit of our result is 5. 
Result so far: 41786.15384615
If we subtract 65 from 70, 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.

The final result is 41786.15384615 with a remainder of 5e-09.