We're dividing 53543421 by 817 
The aim is to understand the frequency of 817 in 53543421.

Let's proceed to step 1:
817 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 817

Step 2:
When dividing 53 by 817, we get 0 with a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Append the next digit (5) from the dividend to 53 and continue with: 535 / 817

Going ahead to step 3:
The number 817 fits into 535 0 times, leaving a remainder of 535.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 535 and we're left with 535.
Bring next digit (4) of the dividend behind the 535 and repeat the process: 5354 / 817

Let's proceed to step 4:
The number 817 fits into 5354 6 times, leaving a remainder of 452.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 4902 from 5354, we get 452.
Take the next digit (3) from the dividend and append it to 452, then repeat: 4523 / 817

Moving on to step 5:
817 can be fit into 4523 5 times, resulting in a remainder of 438.
Write down 5 as next digit of the result. 
Result so far: 65.0
If we take 4085 away from 4523, we end up with 438.
Fetch the next digit (4) from the dividend, attach it to 438 and continue: 4384 / 817

Advancing to step 6:
4384 divided by 817 is 5 with a remainder of 299.
Record the quotient 5 as the next digit in the result. 
Result so far: 655.0
If we take 4085 away from 4384, we end up with 299.
Take the next digit (2) from the dividend and append it to 299, then repeat: 2992 / 817

Moving on to step 7:
The number 817 fits into 2992 3 times, leaving a remainder of 541.
Record the quotient 3 as the next digit in the result. 
Result so far: 6553.0
Subtracting 2451 from 2992 leaves us with 541.
Take the next digit (1) from the dividend and append it to 541, then repeat: 5411 / 817

Advancing to step 8:
The number 817 fits into 5411 6 times, leaving a remainder of 509.
The number 6 becomes the next digit in our result. 
Result so far: 65536.0
Subtract 4902 from 5411 to get 509.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

Going ahead to step 9:
817 can be fit into 5090 6 times, resulting in a remainder of 188.
Put 6 as the next digit of the answer. 
Result so far: 65536.6
Subtract 4902 from 5090 to get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Moving on to step 10:
817 can be fit into 1880 2 times, resulting in a remainder of 246.
Record the quotient 2 as the next digit in the result. 
Result so far: 65536.62
If we subtract 1634 from 1880, we get 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Going ahead to step 11:
817 can be fit into 2460 3 times, resulting in a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 65536.623
The remainder is 9 after subtracting 2451 from 2460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 12:
90 divided by 817 is 0 with a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 65536.623
Subtract 0 from 90 to get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 13:
If we divide 900 by 817, we get 1 and a remainder of 83.
Use 1 as the next digit of our solution. 
Result so far: 65536.62301
If we take 817 away from 900, we end up with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

On to step 14:
The number 817 fits into 830 1 times, leaving a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 65536.623011
Subtracting 817 from 830 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 result is 65536.623011 with a remainder of 1.3e-06.