452845 ÷ 13 
The aim is to understand the frequency of 13 in 452845.

Going ahead to step 1:
If we divide 4 by 13, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 13

Advancing to step 2:
13 can be fit into 45 3 times, resulting in a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 39 from 45, we get 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 13

Advancing to step 3:
The number 13 fits into 62 4 times, leaving a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 34.0
Subtract 52 from 62 to get 10.
Grab the next digit (8) from the dividend, add it to 10, then carry on: 108 / 13

Going ahead to step 4:
108 divided by 13 is 8 with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 348.0
If we take 104 away from 108, we end up with 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 13

On to step 5:
13 can be fit into 44 3 times, resulting in a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 3483.0
If we subtract 39 from 44, we get 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 13

Moving on to step 6:
If we divide 55 by 13, we get 4 and a remainder of 3.
The next digit of our result is 4. 
Result so far: 34834.0
Deduct 52 from 55 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.

Going ahead to step 7:
13 can be fit into 30 2 times, resulting in a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 34834.2
Subtracting 26 from 30 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.

Step 8:
40 divided by 13 is 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 34834.23
The remainder is 1 after subtracting 39 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 9:
13 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 34834.23
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
13 can be fit into 100 7 times, resulting in a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 34834.2307
If we subtract 91 from 100, we 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.

Going ahead to step 11:
The number 13 fits into 90 6 times, leaving a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 34834.23076
The remainder is 12 after subtracting 78 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 12:
120 divided by 13 is 9 with a remainder of 3.
The next digit of our result is 9. 
Result so far: 34834.230769
If we subtract 117 from 120, we get 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 13:
13 can be fit into 30 2 times, resulting in a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 34834.2307692
Subtracting 26 from 30 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 14:
13 can be fit into 40 3 times, resulting in a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 34834.23076923
If we take 39 away from 40, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

After the division, we end up with 34834.23076923 and a remainder of 1e-09.