We look at the division of 13257391 by 447 
The aim is to understand the frequency of 447 in 13257391.

Let's proceed to step 1:
When dividing 1 by 447, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 447

Step 2:
When dividing 13 by 447, we get 0 with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Take the next digit (2) from the dividend and append it to 13, then repeat: 132 / 447

Moving on to step 3:
When dividing 132 by 447, we get 0 with a remainder of 132.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 132 after subtracting 0 from 132.
Take the next digit (5) from the dividend and append it to 132, then repeat: 1325 / 447

Moving on to step 4:
447 can be fit into 1325 2 times, resulting in a remainder of 431.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 894 away from 1325, we end up with 431.
Bring next digit (7) of the dividend behind the 431 and repeat the process: 4317 / 447

Moving on to step 5:
If we divide 4317 by 447, we get 9 and a remainder of 294.
Write down 9 as next digit of the result. 
Result so far: 29.0
If we subtract 4023 from 4317, we get 294.
Grab the next digit (3) from the dividend, add it to 294, then carry on: 2943 / 447

Advancing to step 6:
447 can be fit into 2943 6 times, resulting in a remainder of 261.
Put 6 as the next digit of the answer. 
Result so far: 296.0
If we take 2682 away from 2943, we end up with 261.
Fetch the next digit (9) from the dividend, attach it to 261 and continue: 2619 / 447

Advancing to step 7:
2619 divided by 447 is 5 with a remainder of 384.
Record the quotient 5 as the next digit in the result. 
Result so far: 2965.0
Subtracting 2235 from 2619 leaves us with 384.
Take the next digit (1) from the dividend and append it to 384, then repeat: 3841 / 447

Advancing to step 8:
3841 divided by 447 is 8 with a remainder of 265.
Put 8 as the next digit of the answer. 
Result so far: 29658.0
If we subtract 3576 from 3841, we get 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Advancing to step 9:
447 can be fit into 2650 5 times, resulting in a remainder of 415.
Write down 5 as next digit of the result. 
Result so far: 29658.5
If we subtract 2235 from 2650, we get 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

On to step 10:
4150 divided by 447 is 9 with a remainder of 127.
Put 9 as the next digit of the answer. 
Result so far: 29658.59
Subtracting 4023 from 4150 leaves us with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Going ahead to step 11:
447 goes into 1270 2 times with a remainder of 376.
Write down 2 as next digit of the result. 
Result so far: 29658.592
The remainder is 376 after subtracting 894 from 1270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Advancing to step 12:
3760 divided by 447 is 8 with a remainder of 184.
Record the quotient 8 as the next digit in the result. 
Result so far: 29658.5928
Subtracting 3576 from 3760 leaves us with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

On to step 13:
447 goes into 1840 4 times with a remainder of 52.
The number 4 becomes the next digit in our result. 
Result so far: 29658.59284
Subtracting 1788 from 1840 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 14:
When dividing 520 by 447, we get 1 with a remainder of 73.
Record the quotient 1 as the next digit in the result. 
Result so far: 29658.592841
The remainder is 73 after subtracting 447 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 15:
The number 447 fits into 730 1 times, leaving a remainder of 283.
Use 1 as the next digit of our solution. 
Result so far: 29658.5928411
The remainder is 283 after subtracting 447 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

The final result is 29658.5928411 with a remainder of 2.83e-06.