Let's divide 86418302 by 503
The aim is to understand the frequency of 503 in 86418302.

Moving on to step 1:
If we divide 8 by 503, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 503

Step 2:
If we divide 86 by 503, we get 0 and a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Fetch the next digit (4) from the dividend, attach it to 86 and continue: 864 / 503

Moving on to step 3:
If we divide 864 by 503, we get 1 and a remainder of 361.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 503 from 864 and we're left with 361.
Take the next digit (1) from the dividend and append it to 361, then repeat: 3611 / 503

Going ahead to step 4:
The number 503 fits into 3611 7 times, leaving a remainder of 90.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
The remainder is 90 after subtracting 3521 from 3611.
Include the next digit (8) from the dividend after 90, then repeat: 908 / 503

Advancing to step 5:
503 can be fit into 908 1 times, resulting in a remainder of 405.
The number 1 becomes the next digit in our result. 
Result so far: 171.0
The remainder is 405 after subtracting 503 from 908.
Append the next digit (3) from the dividend to 405 and continue with: 4053 / 503

Step 6:
The number 503 fits into 4053 8 times, leaving a remainder of 29.
Record the quotient 8 as the next digit in the result. 
Result so far: 1718.0
If we take 4024 away from 4053, we end up with 29.
Append the next digit (0) from the dividend to 29 and continue with: 290 / 503

Let's proceed to step 7:
503 can be fit into 290 0 times, resulting in a remainder of 290.
Put 0 as the next digit of the answer. 
Result so far: 17180.0
Deduct 0 from 290 and we're left with 290.
Take the next digit (2) from the dividend and append it to 290, then repeat: 2902 / 503

Going ahead to step 8:
The number 503 fits into 2902 5 times, leaving a remainder of 387.
The next digit of our result is 5. 
Result so far: 171805.0
The remainder is 387 after subtracting 2515 from 2902.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Advancing to step 9:
If we divide 3870 by 503, we get 7 and a remainder of 349.
Write down 7 as next digit of the result. 
Result so far: 171805.7
The remainder is 349 after subtracting 3521 from 3870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Going ahead to step 10:
503 goes into 3490 6 times with a remainder of 472.
The next digit of our result is 6. 
Result so far: 171805.76
The remainder is 472 after subtracting 3018 from 3490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Step 11:
If we divide 4720 by 503, we get 9 and a remainder of 193.
Write down 9 as next digit of the result. 
Result so far: 171805.769
If we subtract 4527 from 4720, we get 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

Let's proceed to step 12:
If we divide 1930 by 503, we get 3 and a remainder of 421.
The next digit of our result is 3. 
Result so far: 171805.7693
If we take 1509 away from 1930, we end up with 421.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4210, and continue the process.

Let's proceed to step 13:
4210 divided by 503 is 8 with a remainder of 186.
Use 8 as the next digit of our solution. 
Result so far: 171805.76938
Subtract 4024 from 4210 to get 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

On to step 14:
The number 503 fits into 1860 3 times, leaving a remainder of 351.
Write down 3 as next digit of the result. 
Result so far: 171805.769383
If we subtract 1509 from 1860, we get 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

Advancing to step 15:
503 goes into 3510 6 times with a remainder of 492.
Use 6 as the next digit of our solution. 
Result so far: 171805.7693836
Subtract 3018 from 3510 to get 492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

Let's proceed to step 16:
The number 503 fits into 4920 9 times, leaving a remainder of 393.
Write down 9 as next digit of the result. 
Result so far: 171805.76938369
If we subtract 4527 from 4920, we get 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Our division results in 171805.76938369 with a remaining 3.93e-07.